C3I-ISR
Command, control, communications and intelligence (C3I) and intelligence, surveillance and reconnaissance, are two concepts that show the interplay of intelligence and operations in modern warfare. There are variants of both, such as C4I, which adds "computers", and ISRTA or RSTA, in which the TA stands for target acquisition.
Whatever the particular set of initials, the key message is that in modern warfare, the interaction of these functions need to be considered in building tools, techniques, and units. The various functions need to use communications protocols that will allow sharing of information.
While the initial examples here will be from the United States, many of the definitions, and even the specific systems, are common in NATO, as well as with allied states such as Australia.
Evolution of C3I-ISR aircraft
Reconnaissance, Surveillance and Target Acquisition Squadron (Brigade Combat Team)