A description is given of CAMAC, a standard devised for the interface of computer systems. The basic requirements for the standard are reviewed, and compared with other similar standards such as NIM. The CAMAC is an "advanced" standard, and at the same time has great flexibility. Described in particular detail are the construction, dataway and command-signals. In the interface, the design of the crate-controller is especially important. The applicability of the CAMAC differs from one computer to another.
