The LS-1.00 Plus Scientific Calculator is a TSR (Terminate and Stay Resident)
program that can use as little as 11K bytes of DOS memory while asleep!

The calculator features three types of logarithms (loge e, log 10, log n),
trigometric functions, including inverse and hyperbolic functions, angle
conversions (degrees, radians, gradians), date and time math, fixed decimals
to 15 significant digits, a full statistical package that includes an array
that will accept 500 numbers, three types of random numbers (defined range
randoms, exponentially distributed randoms defined by your mean, and normal
curve randoms defined by your mean and standard deviation), automatic compu-
tations of standard deviations, permutations, arithmetic means, quadratic
means, harmonic means, geometric means, factorials, exponential functions,
combinations, printer output, disk file output, a user configurable look-up
table, and it operates in binary, octal, hexidecimal, and complex number modes,
among other features.  And, the LS-1.00 Plus Scientific Calculator will work
with any number in the range of -1.79 x 10^308 to 1.79 x 10^308 (depending
upon the number mode).

To use the calculator just point and click with your mouse, scroll and select
with the spacebar or, in many cases, just type from the keyboard.  If you can
you a pocket calculator, then you know how to use the LS-1.00 Plus Scientific!