Command and control

C2ISTAR – C2 plus ISTAR (Intelligence, Surveillance, Target Acquisition, and Reconnaissance)
C3 – Command, Control & Communication (Human activity focus)
C3 – Command, Control & Communications (Technology focus)
C3 – Consultation, Command, and Control [NATO]
C3I – 4 possibilities; the most common is Command, Control, Communications & Intelligence
C3ISTAR – C3 plus ISTAR
C3ISREW – C2ISR plus Communications plus Electronic Warfare (Technology focus)
C4, C4I, C4ISR, C4ISTAR, C4ISREW – plus Computers (Technology focus) or Computing (Human activity focus)[11][12]
C4I2 – Command, Control, Communications, Computers, Intelligence, and Interoperability
C5I – Command, Control, Communications, Computers, Combat systems and Intelligence

Command and Control= (Army + Navy+ Airforce)