call-with-input-file
call-with-output-file
char-downcase
char-ready?
char-upcase
char-whitespace?
current-input-port
denominator
eof-object?
eval
gcd
inexact->exact
interaction-environment
lcm
list->string
load
make-polar
make-rectangular
make-string
modulo
null-environment
numerator
open-input-file
open-output-file
peek-char
quotient
rationalize
read
read-char
remainder
scheme-report-environment
string-ci<=?
string-ci<?
string-ci=?
string-ci>=?
string-ci>?
string-set!
transcript-off
transcript-on
with-input-from-file
with-output-to-file