mcons, mcar, mcdr, set-mcar!, set-mcdr!

mcons, mcar, mcdr, set-mcar!, set-mcdr!

make-weak-box, weak-box-value, weak-box?

hash-eq? hash-count
make-immutable-hasheq, make-immutable-hash
make-hasheqv
make-weak-hasheq, make-weak-hash, make-weak-hasheqv

parameterize
read-case-sensitive

keywords: keyword? string->keyword keyword->string

eq-hash-code

string-copy!

exn:fail:out-of-memory?

regular expressions: regexp-match, regexp-match-positions, ...

call-with-escape-continuation, dynamic-wind, let/ec, call/ec

call-with-exception-handler, uncaught-exception-handler

normalize-arity

read

make-placeholder

version, banner, system-type, current-command-line-arguments, system-library-subpath, current-output-port

eval, eval-jit-enabled