Conformance to R4RS:

Procedure Implemented/Version Notes
Section 4.1 Primitive expressions types
Section 4.1.1 Variable Expressions
Section 4.1.2 Literal Expressions
quoteyes/0.1
Section 4.1.3 Procedure calls
Section 4.1.4 Lambda Expressions
lambdayes/0.1
Section 4.1.5 Conditionals
ifyes/0.1
Section 4.1.6 Assignments
set!yes/0.1
Section 4.2 Derived expressions types
Section 4.2.1 Conditionals
condyes/0.3
caseno
andyes/0.1
oryes/0.1
Section 4.2.2 Binding constructs
letyes/0.1
let*yes/0.3
letrecyes/0.3
Section 4.2.3 Sequencing
beginyes/0.1
Section 4.2.4 Iteration
dono
Section 4.2.5 Sequencing
delayno
Section 4.2.6 Quasiquotation
quasiquoteno
unquoteno
unquote-splicingno
Section 5 Program Structure
Section 5.1 Programs
Section 5.2 Definitions
defineyes/0.1
Section 6 Standard procedures
Section 6.1 Booleans
notyes/0.1
boolean?yes/0.1
Section 6.2 Equivalence predicates
eqv?yes/0.1
eq?yes/0.1
equal?yes/0.1vectors and lists aren't recursively checked yet...
Section 6.3 Pairs and lists
pair?yes/0.1
consyes/0.1
caryes/0.1
cdryes/0.1
set-car!yes/0.1
set-cdr!yes/0.1
caaryes/0.1
cadryes/0.1
cdaryes/0.1
cddryes/0.1
caaaryes/0.1
caadryes/0.1
cadaryes/0.1
caddryes/0.1
cdaaryes/0.1
cdadryes/0.1
cddaryes/0.1
cdddryes/0.1
caaaaryes/0.1
caaadryes/0.1
caadaryes/0.1
caaddryes/0.1
cadaaryes/0.1
cadadryes/0.1
caddaryes/0.1
cadddryes/0.1
cdaaaryes/0.1
cdaadryes/0.1
cdadaryes/0.1
cdaddryes/0.1
cddaaryes/0.1
cddadryes/0.1
cdddaryes/0.1
cddddryes/0.1
null?yes/0.1
list?yes/0.1
listyes/0.1
lengthyes/0.1
appendyes/0.1
reverseyes/0.3
list-tailyes/0.1
list-refyes/0.1
memqyes/0.1
memvyes/0.1
memberyes/0.1
assqyes/0.1
assvyes/0.1
assocyes/0.1
Section 6.4 Symbols
symbol?yes/0.1
symbol->stringyes/0.1
string->symbolyes/0.1
Section 6.5 Numbers
number?yes/0.1
complex?noComplex numbers are not supported yet.
real?yes/0.1
rational?noComplex numbers are not supported yet.
integer?yes/0.1
exact?yes/0.1Currently, the same as integer?
inexact?yes/0.1Currently, the same as real?
zero?yes/0.1
positive?yes/0.1
negative?yes/0.1
odd?no
even?no
minno
maxno
=yes/0.1
<yes/0.1
>yes/0.1
<=yes/0.1
>=yes/0.1
+yes/0.1
*yes/0.1
-yes/0.1
/yes/0.1
quotientno
remainderno
modulono
gcmno
lcmno
numeratorno
denominatorno
floorno
ceilingno
truncateno
roundno
rationalizeno
absyes/0.2
expno
logno
sinno
cosno
tanno
asinno
acosno
atanno
sqrtno
exptno
imag-partno
magnitudeno
angleno
exact->inexactno
inexact->exactno
number->stringno
string->numberno
Section 6.6 Characters
char?yes/0.1
char=?yes/0.1
charyes/0.1
char<=?yes/0.1
char>?yes/0.1
char>=?yes/0.1
char-ci=?yes/0.3
char-ciyes/0.3
char-ci<=?yes/0.3
char-ci>?yes/0.3
char-ci>=?yes/0.3
char-alphabetic?yes/0.3
char-numeric?yes/0.3
char-whitespace?yes/0.3
char-upper-case?yes/0.3
char-lower-case?yes/0.3
char->integeryes/0.3
integer->charyes/0.3
Section 6.7 Strings
string?yes/0.1
make-stringyes/0.1
stringyes/0.1
string-lengthyes/0.1
string-refyes/0.3
string-set!yes/0.1
string=?yes/0.3
stringyes/0.3
string>?yes/0.3
string<=?yes/0.3
string>=?yes/0.3
string-ci=?yes/0.3
string-ciyes/0.3
string-ci>?yes/0.3
string-ci<=?yes/0.3
string-ci>=?yes/0.3
substringyes/0.3
string->listyes/0.3
list->stringyes/0.3
string-copyyes/0.3
string-fill!yes/0.3
Section 6.8 Vectors
vector?yes/0.1
make-vectoryes/0.1
vectoryes/0.1
vector-lengthyes/0.1
vector-refyes/0.1
vector-set!yes/0.1
vector->listyes/0.3
list->vectoryes/0.3
vector-fill!yes/0.3
Section 6.9 Control features
procedure?yes/0.1
applyyes/0.1
mapyes/0.3
for-eachyes/0.3
forceno
call-with-current-continuationrestricted/0.3Only "upward"
Section 6.10 Input and output
call-with-input-fileyes/0.3
call-with-output-fileyes/0.3
input-port?yes/0.3
output-port?yes/0.3
current-input-portyes/0.3
current-output-portyes/0.3
with-input-from-fileyes/0.3
with-output-to-fileyes/0.3
open-input-fileyes/0.3
open-output-fileyes/0.3
close-input-portyes/0.3
close-output-portyes/0.3
readyes/0.3
read-charyes/0.3
peek-charyes/0.3
eof-object?yes/0.3
char-ready?yes/0.3
writeyes/0.3
displayyes/0.3
newlineyes/0.3
write-charyes/0.3
loadyes/0.3
transcript-onno
transcript-offno

Additional Features

Additional Features
whenyes/0.1
unlessyes/0.1

Additional Notes

Implementation Notes
Macros Macro facilities have not been implemented.
Quasi-quotation Quasi-quotation has not been implemented.
reader The scheme reader may very well be quite flakey.