This original sense of 'call' (deriving from the 'call number' used to organize books and other materials in physical libraries) was also responsible for the coinage of 'compiler', according to Grace Hopper: 'The reason it got called a compiler [around 1952] was that each subroutine was given a "call word", because the subroutines were in a library, and when you pull stuff out of a library you compile things. It's as simple as that.'
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