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Civilian Public Service, a national system of work camps for conscientious objectors in the United States administered and paid for by the peace churches during World War II
counts per second, a measurement of the number of instrument-detected events per second, e.g., the number of photons per second in fluorescence emission spectroscopy
Combination Product Set, all ways of choosing the product of m distinct values from a set of n primes, treated as a subset of an n-dimensional lattice to create a musical scale with many just intonation chords
Calls per second in telephony or other telecommunications
Carrier Preselect, a landline telephone option that lets European customers use a third party for call charges instead of using the national operator (British Telecom, KPN, Telekom, Swisscom, Belgacom, etc) without dialling a prefix
Miscellanea
Caterpillar Production System, Modeled after The Toyota production System.
Clerk Police Sergeant, or Clerk Sergeant, a former rank in the London Metropolitan Police
Computerized performance system, a technical system for manipulating audio, video, and symbols, and performing complex and repetitive mixing procedures for recorded or live performance