CPL
From Just Solve the File Format Problem
CPL (Combined Programming Language or Cambridge Programming Language) was a programming language developed at the universities of Cambridge and London in the early 1960s. It is most notable for being a distant ancestor of C and its descendants, since CPL begat BCPL which begat B which begat C which begat C++, C#, Objective-C and other languages, with everything from Java to Perl arguably belonging somewhere in that family tree.
However, the syntax of CPL bears more resemblance to ALGOL than the C family of languages, with := being used for assignments instead of a bare equal sign (as also done in Pascal and Ada).
