Nothing warty about functions named "car, cdr, caar, cadr, cdar, cddr, caaar, caadr, cadar, caddr, cdaar, cdadr, cddar, cdddr, caaaar, caaadr, caadar, caaddr, cadaar, cadadr, caddar, cadddr, cdaaar, cdaadr, cdadar, cdaddr, cddaar, cddadr, cdddar, cddddr"[1]
a domain specific language for walking into nested lists based on an implementation detail of how linked list pointers and values were packed into a single 36-bit memory location on an IBM 704 computer from the 1950s.
[1] https://franz.com/support/documentation/ansicl/dictentr/carc...
[2] https://en.wikipedia.org/wiki/CAR_and_CDR