COS
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The acronym COS may have one of several meanings, the majority having to do with computer operating systems (OSs):
- Card Operating System (OS, ICC)
- Cassette Operating System (OS)
- CoS, or COS, Church of Satan
- Class of Service
- Clip-On Socket (CPU)
- Commercial Operating System (OS, DEC PDP-11)
- Concurrent Operating System (OS, UNIVAC 9200, UNIVAC 9300)
- Corporation for Open Systems (org., OSI user group)
- Cray Operating System (OS, Cray)
- Crypto Operating System (OS, vaporware, Omega)
- cos (or 'cos) is an abbreviation for "because".
See also: cos (lower-case letters), CoS (Church of Scientology).