Stands for “Computer Programming Language” CPL is just a programming language created within the early 1960s from the University of London as well as the University of Cambridge. This programming language was replaced with BCPL. CPL language was implemented very slowly even the first compiler was written for it in 1970.

BCPL (for “Basic CPL”, although originally “Bootstrap CPL”), was a much simpler language based on CPL intended primarily as a systems programming language, particularly for writing compilers; it was first implemented in 1967, prior to CPL’s first implementation. BCPL then led, via B, to the popular and influential C programming language.

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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.