/klas'ik C/, n.
[a play on ?Coke Classic?] The C programming language as defined in the
first edition of K&R, with some small additions. It is also known as ?K&R
C?. The name came into use while C was being standardized by the ANSI X3J11
committee. Also ?C Classic?.
An analogous construction is sometimes applied elsewhere: thus, ?X
Classic?, where X = Star Trek (referring to the original TV series) or X =
PC (referring to IBM's ISA-bus machines as opposed to the PS/2 series).
This construction is especially used of product series in which the newer
versions are considered serious losers relative to the older ones.
The Free On-line Dictionary of Computing (30 December 2018):
(C Classic) The C programming language as defined
in the first edition of K&R, with some small additions. The
name "C Classic", a play on "Coke Classic", came into use
while ANSI C was being standardised by the ANSI X3J11
See also classic.