  KEY          Description:                This is the title record that will show    all the time on the first row above the    scrolling index.                                                                      Copyrighted March, 1990                                                               Soft-Dil                                   Moore Ok.  73153                                                                      All Rights Reserved.                                                                  Version1 Help File 4DBusiness Calculator.                                                a       Determine Statistics of Memory    Use this option to determine statistics  in memory.  When you press the letter "a"  a series of statistic calculations occur.                                               You should press the letter "a" key each time memory is changed.  Failure to press  this key will give wrong statistical       results.                                                                              To Use:                                    1) Load or insert information in memory.   2) Press the letter "a" key.               3) A beep will indicate calculation finish.   A       Square Root                                                                  This option returns the square root of   the number currently being displayed.  Thisis an instant operator, it works with only one argument (the number in the display)   and displays the results immediately after the key has been pressed.                                                             To Use:                                    1) Enter a number into the display window. 2) Press the letter "A" key.                                                                                                        b       Memory + (add to memory)                                                    Adds the current number in the display    window to a memory location.                                                          To Use:                                    1) Enter the number you want to add.       2) Press the letter "b".                   3) Enter the number of the memory location (1 thru 99) that you want to add.                                                                                                                                                                                         B       Memory + (add to memory)                                                     Adds the current number in the display   window to a memory location.                                                          To Use:                                    1) Enter the number you want to add.       2) Press the letter "B".                   3) Enter the number of the memory location (1 thru 99) that you want to add.                                                                                                                                                                                         c       Clear Entry  (c or spacebar)                                                 This option will allow you to clear the  current display number, and start over.  Ifno number is displayed and an operator suchas +-*/ has been pressed, the operator willbe cleared.                                                                             Pressing the letter "c" twice or space   bar twice will result in clearing all      current entries.                             (Note: To clear all memory select the    clear memory option from the menu.)                                                      C       Clear Entry  (C or spacebar)                                                 This option will allow you to clear the  current display number, and start over.  Ifno number is displayed and an operator suchas +-*/ has been pressed, the operator willbe cleared.                                                                             Pressing the letter "c" twice or spacebartwice will result in clearing all current  entries.                                   (Note: To clear all memory select the clearmemory option from the menu.)                                                            d       Variance of N                                                                This option will return the statistical  variance of the current memory.  Where N isthe current memory size.  (Note that memoryof zero if the last memory entry is not    considered in N.  See manual for more      detailed instructions.)                                                               To Use:                                    1) Make sure memory has desired numbers.   2) Press the letter "a" (for calculations).3) Press the letter "d".                                                                 D       Delta (Percent Change)                                                       This option will return the percent      change between two numbers.  It requires   two arguments.                                                                        To Use:                                    1) Enter the first number.                 2) Press the letter "D" key.               3) Enter the second number.                4) Press the enter key or an operator key. The display will show the percent change   between the two numbers.                                                                 e       Effective Interest to APR                                                    This option will change the effective    interest rate to the Annual Percentage     Rate.  It requires two arguments:  The     Effective Interest Rate and the number of  compound periods.                                                                     To Use:                                    1) Enter the effective interest rate.      2) Press the letter "e" key.               3) Enter the number of compound periods.   4) Press enter or any operator key, the    display will show the APR.                    E       Raise X to the power of y                                                    This option will return the first number raised to the power of the second number.                                             To Use:                                    1) Enter the first number.                 2) Press the letter "E" key.               3) Enter the second number.                4) Press the enter key or an operator key.                                                                                                                                                                                f       Standard Deviation N weighted                                                This option will return the Standard     Deviation of the current memory.  It uses  N weighting.  Where N is the number of     memory locations used in the calculation.  (Note N is determined by the last non-zero number in the current memory location. See the manual for more details.)                                                         To Use:                                    1)  Enter desired numbers in memory.       2)  Press the letter "a" key.              3)  Press the letter "f" key.                 F       Factorial!                                                                   This option will return the factorial of any number up to 170.  It requires one     argument.  (All numbers are truncated to   whole numbers.)                                                                       To Use:                                    1) Enter a number between 0 and 169.       2) Press the letter "F" key.                                                                                                                                                                                              g       Sum of N Squared                                                             This option will return the sum of the   squares of the current memory.  This       number is in many statistical formulas.                                                 Make sure the current memory has the     desired numbers.  You can load different   memories by choosing the menu option load  memories.  (Note: To make sure statistical calculations are accurate press the letter "a" key.)                                                                                                                           G       Percent %                                                                    This option will convert the number in   the display to a percentage.                                                          To Use:                                    1) Enter a number.                         2) Press the letter "G" key.               Display will show  number as a percent.                                                                                                                                                                                                                              h       Sum of N (Current Memory)                                                    This option will return the sum of the   current memory.  This calculation is used  in many statistical routines.                                                         To Use:                                    1) Make sure correct memory is loaded, if  not select the menu option "Load Memory",  or enter the numbers in memory.            2) Press the letter "a" key to calculate   the statistics.                            3) Press the letter "h" key.                                                             H       +/-  Change Display Sign                                                     This option will change the current      number's sign being displayed.  (e.g. The  number 12 is displayed, pressing the letter"H" key will change 12 to -12.)                                                       To Use:                                    1) Enter a number or use any number in the display.                                   2) Press the letter "H" key.               3) The number will change signs.                                                                                                    i       Interest Annuity Due                                                         Two operations are possible.  You can    enter the interest if it is known, or you  can calculate the interest of an annuity   due.                                                                                  To Use:  (Entering the interest)           1)  Enter the number into the display.     2)  Press the letter "i" key.              To Use:  (Computing interest)              1)  Enter periods, payment, and PV or FV.  2)  Press the compute key.  (Letter "o")   3)  Press the letter "i" key.                 I       Interest Ordinary Annuity                                                    Two operations are possible.  You can    enter the interest if it is known, or you  can calculate the interest of an ordinary  annuity.                                                                              To Use:  (Entering the interest)           1)  Enter the interest number.             2)  Press the letter "I" key.              To Use:  (Computing the interest)          1)  Enter periods, payments, and PV or FV. 2)  Press the compute key.  (Letter "O")   3)  Press the letter "I" key.                 j       Number of Memory Locations                                                   Returns the current number of memory     locations for statistical sample size.                                                  This figure is based on the last non-zeroentry in memory.  For example if current   memory has a number in the 55 position and the remaining numbers 56 thru 99 are zero  then the current sample size is 55.  If youhave zeros in your sample make sure they   appear before the last non-zero memory     location.  Note: To make sure this figure  is accurate press the letter "a" key.         J       1/X  Inverse                                                                 Returns the inverse of the number        currently being displayed.  This is an     instant operator.                                                                     To Use:                                    1) Enter the desired number.               2) Press the "J" key.                      The display will show inverse number.                                                                                                                                                                                     k       Variance of N-1                                                              This key returns the variance of the     current memory, weighted.  The sample      size is weighted by subtracting one from   the sample size.                                                                      To Use:                                    1) Make sure the current memory is desired.2) Press the "a" key. (To calculate stats.)3) Press the letter "k" key.                                                                                                                                                   K       Antilogarithm  (e to X)                                                      Will calculate the natural antilogarithm (base e). Raises e to the power of X.  Thisis an instant operator.                                                               To Use:                                    1) Enter the desired number.               2) Press the "K" key.                      Display will show e raised to the power of X.  (X is the number in the display)                                                                                                                                           l       Standard Deviation N-1                                                       This key returns the standard deviation  of the current memory, weighted.  The      standard deviation is weighted by          subtracting one from the sample size.                                                 To Use:                                    1) Make sure the desired memory is loaded. 2) Press the letter "a". (Computes Stats)  3) Press the letter "l" key.               The display will show the weighted standarddeviation.                                                                               L       Natural Logarithm                                                            Returns the log (base e) of the current  number being displayed.  This is an instantoperator.                                                                             To Use:                                    1) Enter the desired number.               2) Press the "L" key.                                                                 The display shows the log of the number.                                                                                                                                       m       Recall a Memory Location                                                     This option will recall a number from    memory and place it in the display window. Use this option when a number in memory is needed to complete an operation.                                                      To Use:                                    1)  Press the letter "m" key.              2)  Enter the desired memory location's    number.  (1 thru 99)                       3)  Press the enter or return key.         The number in the display will be the      number in that memory location.               M       Recall a Memory Location                                                     This option will recall a number from    memory and place it in the display window. Use this option when a number in memory is needed to complete an operation.                                                      To Use:                                    1)  Press the letter "M" key.              2)  Enter the desired memory location's    number.  (1 thru 99)                       3)  Press thee enter or return key.        The number in the display will be the      number in that memory location.               n       Memory -  (Subtract from Memory)                                             This option will allow you to subtract   the number currently in the display window from a specific memory location.                                                      To Use:                                    1)  Enter the number you want to subtract  from memory, in the display window.        2)  Press the letter "n" key.              3)  Enter the specific memory location's   number.  (1 thru 99)                       4)  Press the enter or return key.                                                       N       Memory -  (Subtract from Memory)                                             This option will allow you to subtract   the number currently in the display window from a specific memory location.                                                      To Use:                                    1)  Enter the number you want to subtract  from memory, in the display window.        2)  Press the letter "N" key.              3)  Enter the specific memory location's   number.  (1 thru 99)                       4)  Press the enter or return key.                                                       o       Compute                                                                      This option will compute an unknown      annuity variable.  If you know at least    three variables of an annuity, you can     usually find the other two unknowns.  This key can be used to determine the interest, compound periods (N), present value, and   future value, of ordinary annuities and    annuity dues.  (If the first payment of a  payment series, such as a home loan, is dueat the end of the first period it is an    ordinary annuity, if payment is due at the first of the period it is an annuity due.)    O       Compute                                                                      This option will compute an unknown      annuity variable.  If you know at least    three variables of an annuity, you can     usually find the other two unknowns.  This key can be used to determine interest,     compound periods (N), present value, and   future values, of ordinary annuities and   annuity dues.  (If the first payment of a  payment series, such as a home loan, is dueat the end of the first period, it is an   ordinary annuity, if the payment is due thefirst of the period it is an annuity due.)    p       Print & Program (Not available)                                              This option will be offered in a future  release.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    P       Print & Program (Not Available)                                              This option will be made available in    future releases.                                                                                                                                                                                                                                                                                                                                                                                                                                                                            q       Cash Flow Internal Rate Return.                                              This key serves two functions, it stores the interest rate used in net present valuecalculations and it computes the Internal  Rate of Return, using the current memory asfuture cash-flows in increments of one     period.                                    To Store Interest Rate: 1. Enter the numberand press the "q" key.                     To Calculate IRR:  1. Load Memory and enterthe present value in the "Q" key.  2. Pressthe letter "o" key.  3.  Press the letter  "q" key.  You may have to wait a long time.   Q       Net Present Value                                                            This key serves two functions, it is usedto store the present value at time zero, innet present value calculations this should be a negative number.   It also is used to compute Net Present Value and Profit Index.                                           To Enter Present Value: 1. Enter present   value.  Then press the letter "Q" key.     To Compute Present Value and Profit Index. 1. Load correct memory and interest rate.  2. Press the letter "O".  3. Press the "Q" key.  PI and NPV will show in registers.      r       Payment Annuity Due                                                          Two operations are possible.  You can    enter the payment if it is known, or you   can calculate the payment of an annuity    due.                                                                                  To Use:  (Entering the payment)            1)  Enter the payment in the display.      2)  Press the letter "r" key.              To Use:  (Computing the payment)           1)  Enter interest, periods, and PV or FV. 2)  Press the compute key.  (Letter "o")   3)  Press the letter "r" key.                 R       Payment Ordinary Annuity                                                     Two operations are possible.  You can    enter the payment if it is known, or you   can calculate the payment of an ordinary   annuity.                                                                              To Use:  (Entering the payment)            1)  Enter the number in the display.       2)  Press the letter "R" key.              To Use:  (Computing the payment)           1)  Enter interest, periods, and PV or FV. 2)  Press the compute key.  (Letter "O")   3)  Press the letter "R" key.                 s       Mean of Current Memory                                                       Returns the mean of the current memory.  Make sure to compute the statistics before using the results of this key. (The "a" keycomputes statistical information.)                                                    To Use:                                    1)  Enter or load the memory you desire to use.                                       2)  Press the letter "a" key. (Compute     Statistics)                                3)  Press the letter "s" key.                                                            S       Square a number                                                              Squares the number currently being       displayed.  This is an instant operator.                                              To Use:                                    1)  Enter the number you want to square.   2)  Press the letter "S" key.                                                                                                                                                                                                                                                                                   t       Compound Periods Annuity Due                                                 Two operations are possible.  You can    enter the compound periods, if they are    known.  Or you can calculate the number of periods in an annuity due.                                                            To Use:  (Entering the Compound Periods)   1) Enter number in display.                2) Press the letter 't' key.               To Use:  (Computing the number of Periods) 1) Enter interest, payment, and PV or FV.  2) Press the compute key.  (Letter 'o')    3) Press the letter 't' key.                  T       Compound Periods Ordinary                                                    Two operations are possible.  You can    enter the compound periods, if they are    known.  Or you can calculate the number of periods in an ordinary annuity.                                                       To Use:  (Entering the Compound Periods)   1)  Enter number in display.               2)  Press the letter 'T' key.              To Use:  (Computing the Number of Periods) 1)  Enter interest, payment, and PV or FV. 2)  Press the compute key. (Letter 'O')    3)  Press the letter 'T' key.                 u       Future Value Annuity Due                                                     Two operations are possible.  You can    enter the future value if it is known.  Or you can calculate the future value of an   annuity due.                                                                          To Use:  (Entering the future value)       1)  Enter future value in display.         2)  Press the letter 'u' key.              To Use:  (Computing future value)          1)  Enter Interest, Periods, and Pmt or PV.2)  Press the compute key. (Letter 'o')    3)  Press the letter 'u' key.                 U       Future Value Ordinary Annuity                                                Two operations are possible.  You can    enter the future value if it is known, or  you can calculate the future value of an   ordinary annuity.                                                                     To Use:  (Enter the future value)          1)  Enter the present value in the display.2)  Press the letter 'U'.                  To Use:  (Computing the future value)      1)  Enter Interest, Periods, and Pmt or PV.2)  Press the compute key.  (Letter 'O')   3)  Press the letter 'U' key.                 v       Clear Single Memory Location                                                 This option allows you to clear a currentmemory location.  (This option allows you  to clear only a single location.  To clear all memory locations select the Memory     menu option "Clear Memory".)                                                          To Use:                                    1)  Press the letter "v" key.              2)  Enter the memory location you desire   to clear.  (1 thru 99)                     3)  Press the enter or return key.                                                       V       Clear Single Memory Location                                                 This option allows you to clear a currentmemory location.  (This option allows you  to clear only a single location.  To clear all memory locations select the Memory menuoption "Clear Memory".)                                                               To Use:                                    1)  Press the letter "V" key.              2)  Enter the memory location you want to  clear.  (1 thru 99)                        3)  Press the enter or return key.                                                       w       Annual Rate to Effective Rate                                                This option will change the Annual       Percentage Rate (APR) to the Effective     Interest Rate.  It requires both the APR   and the number of compound periods.                                                   To Use:                                    1)  Enter the Annual Percentage Rate.      2)  Press the letter "w" key.              3)  Enter the number of compound periods.  4)  Press enter or any operator key.       The display will show the Effective        Interest Rate.                                W       Root  (Number to Xth root)                                                   This option requires two arguments.  The first number you enter is the number whose root you want to find.  The second number  is the root.  This is an instant operator.                                            To Use:                                    1)  Enter the number to find the root of.  2)  Press the letter "W" key.              3)  Enter the root number.                 4)  Press the enter or any other operator  key.                                                                                     x       Store Memory in Location                                                     This option allows you to enter the      currently displayed number into a memory   location, for later recall.                                                           To Use:                                    1)  Enter the number you want to store.    2)  Press the letter "x" key.              3)  Enter the memory location you want to  store the number in.  (1 thru 99)          4)  Press the enter or return key.                                                                                                  X       Store Memory in Location                                                     This option allows you to enter the      currently displayed number into a memory   location, for later recall.                                                           To Use:                                    1)  Enter the number you want to store.    2)  Press the letter "X" key.              3)  Enter the memory location you want to  store the number in.  (1 thru 99)          4)  Press the enter or return key.                                                                                                  y       Present Value Annuity Due                                                    Two operations are possible.  You can    enter the present value if it is known, or you can calculate the present value of an  annuity due.                                                                          To Use:  (Entering the present value)      1)  Enter present value number in display. 2)  Press the letter "y" key.              To Use:  (Computing the present value)     1)  Enter interest, periods, and Pmt or FV.2)  Press the compute key.  (Letter "o")   3)  Press the letter "y" key.                 Y       Present Value Ordinary Annuity                                               Two operations are possible.  You can    enter the present value if it is known, or you can calculate the present value of an  ordinary annuity.                                                                     To Use:  (Entering the present value)      1)  Enter the present value in the display.2)  Press the letter "Y" key.              To Use:  (Computing the present value)     1)  Enter interest, periods, and Pmt or FV.2)  Press the compute key.  (Letter "O")   3)  Press the letter "Y" key.                 z       Menu  (z or Alt key calls menu)                                              Pressing the z or alt key will display a popup menu.  From this menu you can select all the major options available.                                                        These options are selected by using the  arrow keys.                                                                             For more information about these options and what they do, look for the key word    "Main" in help, or read the manual.                                                                                                 Z       Menu  (Z or Alt key calls menu)                                              Pressing the Z or alt key will display   a popup menu.  From this menu you can      select all the major options available.                                                 These options are selected by using the  arrow keys.                                                                             For more information about these options and what they do, look for the key word    "Main" in help, or read the manual.                                                                                               Main      Main Menu                                                                    The main menu is the menu from which all other menu activities are accessible.  You can select the following options:                                                     1)  About Soft-Dil: Describes our company. 2)  Help: Selects this option.             3)  Color: Change programs colors.         4)  Line Mode: Toggles line mode (25,43,50)5)  Memory: Selects the memory menu.       6)  Options: Selects the option menu.      7)  Exit: Ends program.                    8)  Dos: Exits to Dos command line.         Main      About Soft-Dil                                                               If you choose this option you will be    shown a short description of our company.  And it's distribution policies, and an     advertisement about our new products.                                                   You can write us and register your copy  at the address in this display.            Registration is strongly recommended, it   may have cash benefits for you. For detailsread this option and start benefitting     today.                                                                                 Main      Help  (Menu or F1 key.)                                                      When you select this option from the mainmenu a help screen will pop-up.  The help  screen consists of an index of currently   available on-line help.  You can move      through this index with the up down arrow, page-up page-down, home, and end keys, or  you can press a letter key.  If you choose to press a letter key, such as "z", the    index will move to the first occurrence of the letter "z" in the first position of theindex.                                                                                 Main      Color                                                                       The color menu allows you to customize thecolors on your screen.  You can change the color of: The calculator, memory, menu,    help, and error windows.                                                               If you change any of these options you canpermanent save your changes, if you choose the save current configuration before you  leave the program.  You can save these     changes under the options menu, or at the  exit program menu selection.                                                           Main      Line Mode                                                                   The line mode menu is available for those with monitors and adaptors capable of      displaying 25, 43, and 50 lines.  This     is the CGA, EGA, and VGA respectively.                                                 Use this option if you want to see more   memory registers.  You can force this line mode from the options menu, if you have an EGA or VGA monochrome monitor and adaptor.                                                                                                                                   Main      Memory Menu                                                                 The memory menu consists of five separate options.  You can load and save up to      eighteen memory files turn memory display  on and off, clear the current memory, and  restore a previous "lost" memory.  Menu    selection:                                 1)  Save Memory:  Saves current memory.    2)  Load Memory:  Loads a memory.          3)  Memory (ON/OFF): Turn on or off memory.4)  Memory Clear: Clears current memory.   5)  Restore Memory: Restores last memory.                                              Main      Options Menu                                                                 The options menu lets you configure this program.  From this menu you can, turn on  and off several different options.                                                      You can also save your current           configuration with the save configuration  option.  For a more details on each        option look for the key word "Option" in   the on-line help index or consult your     manual.                                                                                                                           Main      Exit                                                                         Choose this option when you want to      leave the calculator, and return to the    calling program or DOS.                                                                 From this menu you can save the current  configuration if you have made any changes.                                             To leave this menu without leaving the   calculator program press escape.                                                                                                                                             Main      DOS                                                                          This option will shell the user to the   DOS prompt.  From the dos prompt you can   run other programs, if you have enough     memory.  To return to the calculator       program type "EXIT" at the dos prompt and  press enter or return.                                                                  (Note: This option does require the DOS  command.com file to be in the path.  See   your DOS manual for more details about the path statement.)                                                                       Color     Color Menu Selections                                                        Use this option if you want to change    the colors on your display.                                                             Use the up and down arrow keys to move   the checkmark to different colors.  As you move the checkmark the colors of the       selected item will change.  Press escape   to exit, or "b" to go back to the previous color selection.                                                                       Save your changes in the options menu or  as you exit the program.                    Line      Line Mode Menu                                                               You can change the number of rows the    calculator will display from this option.  The actual selection depends upon your     video configuration.  CGA and Monochrome   is 25 lines, EGA is 25 and 43 lines, VGA is25, 43, and 50 lines.                                                                   This option will allow you to see more   memory locations.                                                                       This option can be forced, if you own a  monochrome screen from the options menu.    Memory    Memory Save Option                                                           This option saves the current memory to  one of eighteen possible memory files.     When you select this option you will be    prompted to enter a description of the     memory you are saving.  It is important to enter a good description, since you will   latter use that description to recall the  memory from a file.                                                                     You can also delete memory files from    this menu selection, and from the load     memory selection.                           Memory    Load Memory Option                                                           You can load a previous saved memory fromthis menu.  You can also delete any memory file.  (Delete a file by putting the       highlight bar over the file you want to    delete and press the "D" key.)                                                          To load a memory use the up and down     arrow keys to highlight the memory you     want.  And press the enter or the return   key.  The memory will be loaded, if no     memory exists all zeros will be loaded intomemory.                                     Memory    Memory ON/OFF Option  or F3 key                                              This option will allow you to turn the   memory display on or off.  If you turn the memory on at least 12 memory locations willbe displayed on screen.  If you have an EGAor VGA monitor you can view more memory    locations by selecting the Line Mode optionon the main menu.                                                                        If the memory is turned on you can see  different memory locations by pressing the page up or page down key.  99 memory       locations are available for viewing.        Memory    Memory Clear Option                                                          You can choose the memory clear option ifyou want to set the current memory to all  zeros.                                                                                  If you clear the memory by mistake, you  can restore it to it's original condition  by selecting the Restore Memory Option fromthe Memory Menu.                                                                                                                                                                                                        Memory    Restore Memory Option                                                        Use this option if you desire to restore the previous memory.  This option can      recall otherwise lost information.  It willrestore the last memory, if the memory was cleared, the program was exited from the   exit menu, or a memory load occurred.                                                   Do not use this option instead of saving up your files.  You should always save up  your files on a regular basis.                                                                                                    Options   Fix number in display                                                        With this option you can fix a decimal   point in the number you are currently      entering.                                                                              You can fix the decimal at 0 to 14 places.To use this option use the up and down     arrow keys to highlight the fix option.    Press enter and enter the number of places you desire.                                                                                                                                                                  Options   Round number in display.                                                     You can use this number to round the     number shown in the display, from 0 to 14  places.  To use this option use the up and down arrow keys to highlight, then press   the enter or return key, enter the number  of places that you desire to round.                                                     The numbers used in calculations still   retains their 14 place accuracy.                                                                                                                                             Options   Comma or F4 key                                                              Using this option will put commas into   the number currently being displayed.  Thisoption can also be used to display the     European format, periods instead of commas.                                             To use this option select the menu optionwith the up and down arrow keys, press the return or enter key.  If you want to use   this option in European format, start the  program with the command line as follows:  4DBUSCAL E                                                                             Options   Share Registers                                                              This option will allow the annuity due   and ordinary annuity to share the same     values in calculations.  If you enter a    number in the ordinary annuity register    such as the present value.  Then it will beshared by both the ordinary annuity and theannuity due calculations.                                                               You will see the same number when you    switch windows.                                                                                                                   Options   Caps (Toggles Display)                                                       This option will display one line of mathfunctions, based on the caps lock state.   If the caps lock is toggled to capital     letters, the line of capital letter        functions will be displayed.  If the caps  lock key is toggled to small letters then  the line of small lettered math functions  will be displayed.                                                                      Using this option helps to unclutter the screen, and make all functions more        readable.                                   Options   Status Line                                                                  This option will display information on  the calculator.  The information it will   display is Fix, Round, Insert, Num Lock,   and Auto Interest.                                                                      If these options are turned on the word  ON will appear by their name, or a number  will appear.  Such as "Fix  2" will        indicate that the fix option is turned on  to the number 2.                                                                                                                  Options   Auto-Load                                                                    This option will automatically load the  last memory, from the last session.  (For  this option to work you must exit the      program.  Do not turn off the computer.)                                                Please do not use this option instead of regular back-up.  You should try to save   your files often in case of power failure  or accidental shut-down.                                                                                                                                                     Options   Memory ON or OFF or use F3 key                                               Use this option to turn your memory on oroff.  When you turn your memory on it will show at the bottom of your screen, below   the calculator.  If you are in 25 line modethen the first 12 memory locations will be displayed.  To see more memory locations   press the page-up or page-down keys.                                                    If you are in 43 or 50 line mode you willsee more memory locations.                                                                                                        Options   Initial Read                                                                 Memory files are identified by a separateindex file, with a file description that   you type in.  This option when turned on   will check all memory files to see if they contain any information.  If information isfound a message is written in the index:   "Description Not Available."  Use this     option if you didn't describe a file that  you previously saved.                                                                  Leaving this option off will speed initialprogram load by many seconds.               Options   Intro Screen                                                                 This option will turn the introduction   screen on or off.  When the program first  starts an introduction screen is displayed.                                             Using this option will result in a       slightly faster program load.  (The actual decrease in time is 5 seconds.)                                                                                                                                                                                                                                    Options   Auto APR  (Annual Percent Rate)                                              This option will automatically convert   the annual percentage rate (APR) to the    per compound period percentage rate used inpresent value calculations.  Use this      option only if you are working with APR.                                                The following formula is used to find theinterest rate per compound period:              (I/12)/100  where I = APR             If you have an APR of 12 then entering 12  into the display and pressing the "i" or   "I" key will give the interest rate of .01. Options   Force Line Mode                                                             If you own a VGA or EGA monochrome monitorand adaptor, this option will allow you to display 43 and 50 line modes.  Your monitormust be capable of displaying these modes  or the system will crash.                                                              Turning this option ON will allow you to  select between 25, 43, and 50 line modes.                                                                                                                                                                               Options   Shadow                                                                       You can turn the shadow the calculator   casts on the background OFF.  If you decidethat the color scheme you have selected    would look better without a shadow being   cast then turn the shadow off.                                                          Most monochrome monitors will look       slightly better if the shadow is turned    off.                                                                                                                                                                         Options   Sound                                                                        If you don't like the sounds that the    calculator makes you can turn them off.    The sound was designed to get your         attention without being too intrusive.                                                  Turning the sound off is not recommended.Sound is used to prompt you of errors and  other important information.                                                                                                                                                                                            Options   Save Configuration                                                           This option will save configuration and  make them the default configuration.  The  default configuration is loaded from a filewhen the program first starts.                                                          Choose this option if you want to make   any of the options you change permanent.                                                                                                                                                                                                                           Exit      Exit Menu  (Menu OR Escape key)                                              Choose this option when you want to leavethe calculator and return to the calling   program or DOS.  From this menu pressing   escape will return you the calculator.     If you have made configuration changes the calculator will make a sound, and you will be presented with an option to save your   changes.  If you choose to save the changesthen those changes will be loaded as the   default next time you start the program.                                                                                          DOS       Returns you to the DOS prompt                                                This option allows you to shell to the   DOS prompt.  If you have enough memory you can run other programs.                                                                 To return to the calculator program type "EXIT" at the DOS prompt and press the     enter or return key.                                                                                                                                                                                                                                               Edit      Edit number (f2 or left arrow)                                               You can edit any number that you are     currently entering.  To edit the number    press the f2 function key or press the leftarrow key.                                                                              After you enter the edit mode, you can   move the cursor with the left and right    arrow keys, or with the letter keys "s" and"d", you can also insert a number or type  over.  Pressing enter or escape will acceptthe changes you have made.                                                            