C4ISR is a military acronym for command and control, communications, computers, intelligence, surveillance, and reconnaissance ( German: management and control, communications, computers, information gathering, surveillance and reconnaissance ), which was first used by the armed forces of the United States.

The term refers primarily to the networking of all management, information and monitoring systems to obtain a more accurate picture of the situation and thus to improve decision-making and leadership skills of leadership.

C4ISR is playing an ever greater role in the wake of the forced -driven transformation of the U.S. armed forces; one encounters the term in numerous policy papers and policy statements - for quite some time around the world not only in the U.S. armed forces, but in the wake of the increasing computerization of the armies and the ever IT lastigeren battle management in military organizations.

A further development of network-centric operations today is C4ISTAR and stands for C4I ( Command, Control, Computers, Communications, information), the so-called management information system, and ISTAR ( Intelligence, Surveillance, Target Acquisition, Reconnaissance ), the education system.