[A] cryptosystem performing or controlling a function as an integral element of a larger system or subsystem. [INFOSEC-99]

Cryptography engineered into an equipment or system whose basic function is not cryptographic. [INFOSEC-99]

Telephone-company-provided premises equipment in use or in inventory of a regulated telephone utility as of divestiture (December 31, 1983).

A channel provided on telecommunications facilities to support administration and maintenance. For primary rate access, the EOC is the extended superframe (ESF) data link. [T1.408-1990]

In non-ADP equipment, a CPU and firmware that are critical to the operation of the equipment.
Note: An embedded processor is not subject to FIRMR regulation when used for control of devices such as weapons systems, communications devices, home appliances, automobile diagnostics, etc.

Abbreviation for electromagnetic compatibility.

Analysis of a system, subsystem, facility, or equipment to determine its electromagnetic compatibility (EMC) status.
Note: The EMC analysis may be theoretical analysis before construction or an empirical analysis after construction.

Abbreviation for emission control.

Abbreviation for equilibrium mode distribution.

Abbreviation forelectromagnetic environment.