What does CISC stand for?

Complex Instruction Set Computer

A complex instruction set computer is a computer where single instructions can execute several low-level operations or are capable of multi-step operations or addressing modes within single instructions. The term was retroactively coined in contrast to reduced instruction set computer.

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Counterintelligence Support Cell

Continuous Inventory of Stand Conditions

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Configuration Interaction (with) Size-consistency (correction)

Complex Instruction Set Computers