Playing around with building a r5rs-ish scheme. In addition to being a stupid re-implementation of the wheel, it also suffers from not being very round.

That said, this is general status toward a r[57]ish scheme:

• eqv?
• eq?
• equal?

• integer?

• float?

• exact?

• inexact?

• zero? (library)

• positive? (library)

• negative? (library)

• odd? (library)

• even? (library)

• max (library)

• min (library)

• >

• <

• <=

• >=

• =

• +

• *

• -

• /

• abs (library)

• quotient

• remainder

• modulo

• gcd (library)

• lcm (library)

• floor

• ceiling

• truncate

• round

• exp

• log

• sin

• cos

• tan

• asin

• acos

• atan

• sqrt

• expt

• number->string

• string->number

• not
• boolean?

• pair?
• cons
• car
• cdr
• set-car!
• set-cdr
• caar/cadr -- cdddar/cddddr (library)
• null?
• list? (library?)
• list (library)
• length (library?)
• append (library)
• reverse (library)
• tail-list (library)
• list-ref (library)
• memq (library)
• memv (library)
• member (library)
• assq (library)
• assv (library)
• assoc (library)

• symbol?
• symbol->string
• string->symbol

• char?

• char=?

• char<?

• char>?

• char<=?

• char>=?

• char-ci=? (library)

• char-ci<? (library)

• char-ci>? (library)

• char-ci<=? (library)

• char-ci>=? (library)

• char-alphabetic? (library)

• char-numeric? (library)

• char-whitespace? (library)

• char-upper-case? (library)

• char-lower-case? (library)

• char->integer

• integer->char

• char-upcase (library)

• char-downcase (library)

• string?

• make-string

• string (library)

• string-length

• string-ref

• string-set!

• string=? (library)

• string-ci=? (library)

• string<? (library)

• string>? (library)

• string<=? (library)

• string>=? (library)

• string-ci<? (library)

• string-ci>? (library)

• string-ci<=? (library)

• string-ci>=? (library)

• substring (library)

• string-append (library)

• string->list (library)

• list->string (library)

• string-copy (library)

• string-fill! (library)

• procedure?
• apply
• map (library)
• for-each (library)
• force (library)
• call-with-current-continuation
• values
• call-with-values
• dynamic-wind

• eval
• scheme-report-environment
• null-environment
• interaction-environment

• call-with-input-file (library)
• call-with-output-file (library)
• input-port?
• output-port?
• current-input-port
• with-input-from-file
• with-output-to-file
• open-input-file
• open-output-file
• close-input-port
• close-output-port

• read
• read-char
• peek-char
• eof-object?
• char-ready?

• write (machine-readable)
• display (human readable) [ not quite right... ]
• newline
• write-char

• and (library)
• or (library)
• if

• load
• transcript-on
• transcript-off

• make-hash-table

• hash-table?

• alist->hash-table

• hash-table-equivalence-function

• hash-table-hash-function

• hash-table-ref

• hash-table-ref/default

• hash-table-set!

• hash-table-delete!

• hash-table-exists?

• hash-table-update!

• hash-table-update!/default

• hash-table-size

• hash-table-keys

• hash-table-values

• hash-table-walk

• hash-table-fold

• hash-table->alist

• hash-table-copy

• hash-table-merge!

• hash

• string-hash

• string-ci-hash

• hash-by-identity