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}.

[glossary]
[Reference(s) to this entry by made by: {core dump}{Core Wars}{EMACS}{fandango on core}{marginal}{moby}{prowler}{slurp}{Stone Age}{store}{swap}{walk}]