REP
A directive used in {IBM} {object code} {card decks} (and later {PTF Tapes}) to REPlace fragments of already
assembled or compiled object code prior to {link edit}.
Recompiling or reassembling the {source code} to produce a
whole new object module was only possible if the {source code}
was available, which it rarely was (if you had the object you
were lucky!) It was also quicker to apply incremental changes
with REP cards and they also circumvented the {checksums} and
{card sequence numbers} present in the object code.
(1998-07-16)