Core: N. Main Storage Or RAM. Dates From The Days Of Ferrite-core Memory

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:core: n. Main storage or RAM. Dates from the days of
ferrite-core memory; now archaic as techspeak most places outside
IBM, but also still used in the UNIX community and by old-time
hackers or those who would sound like them. Some derived idioms
are quite current; `in core', for example, means `in memory'
(as opposed to `on disk'), and both {core dump} and the `core
image' or `core file' produced by one are terms in favor. Some
varieties of Commonwealth hackish prefer {store}.
-- The AI Hackers Dictionary

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