<games> (Or more recently, "Core Wars") A game played between assembly code programs running in the core of a simulated machine (and vicariously by their authors). The objective is to kill your opponents' programs by overwriting them. The programs are written using an instruction set called "Redcode" and run on a virtual machine called "MARS" (Memory Array Redcode Simulator). Core War was devised by Victor Vyssotsky, Robert Morris Sr., and Dennis Ritchie in the early 1960s (their original game was called "Darwin" and ran on a PDP-1 at Bell Labs). It was first described in the "Core War Guidelines" of March, 1984 by D. G. Jones and A. K. Dewdney of the Department of Computer Science at The University of Western Ontario (Canada). Dewdney wrote several "Computer Recreations" articles in "Scientific American" which discussed Core War, starting with the May 1984 article. Those articles are contained in the two anthologies cited below. A.K. Dewdney's articles are still the most readable introduction to Core War, even though the Redcode dialect described in there is no longer current. The International Core War Society (ICWS) creates and maintains Core War standards and the runs Core War tournaments. There have been six annual tournaments and two standards (ICWS'86 and ICWS'88). ["The Armchair Universe: An Exploration of Computer Worlds", A. K. Dewdney, W. H. Freeman, New York, 1988, ISBN 0-7167-1939-8, LCCN QA76.6 .D517 1988] ["The Magic Machine: A Handbook of Computer Sorcery", A. K. Dewdney, W. H. Freeman, New York, 1990, ISBN 0-7167-2125-2 (Hardcover), 0-7167-2144-9 (Paperback), LCCN QA76.6 .D5173 1990]. (1998-10-30)

<games, standard, body> (ICWS) The official standards body for Core War. (1996-02-16)

main memory

<storage> (Or "core") An early form of non-volatile storage built (by hand) from tiny rings of magnetisable material threaded onto very fine wire to form large (e.g. 13"x13" or more) rectangluar arrays. Each core stored one bit of data. These were sandwiched between printed circuit boards(?). Sets of wires ran horizontally and vertically and where a vertical and horizontal wire crossed, a core had both wires threaded through it. A single core could be selected and magnetised by passing sufficient current through its horizontal and vertical wires. A core would retain its magnetisation until it was re-magnetised. The two possible polarities of magnetisation were used to represent the binary values zero and one. A third "sense" wire, passed through the core and, if the magnetisation of the core was changed, a small pulse would be induced in the sense wire which could be detected and used to deduce the core's original state. Some core memory was immersed in a bath of heated oil to improve its performance. Core memory was rendered obsolete by semiconductor memory. For example, the 1970s-era NCR 499 had two boards, each with 16 kilobytes of core memory. (1996-03-04)

Financial Core (also known as FiCore or Fi-Core) refers to a legal carve out that permits workers opposed to participating in a labor union to be employed under the benefits of a union's contracts without compelling them to be a member of that union.

Magnetic-core memory was the predominant form of random-access computer memory for 20 years between about 1955 and 1975.

Common Object Services Specification in CORBA.

The open-core model is a business model for the monetization of commercially produced open-source software. Coined by Andrew Lampitt in 2008, the open-core model primarily involves offering a "core" or feature-limited version of a software product as free and open-source software, while offering "commercial" versions or add-ons as proprietary software.

Common Object Services Specification