BNC

The BNC connector is a bayonet-locking type for two-conductor coaxial cable, introduced in the late 1940'es. The name BNC is an abbreviation that has, over time, gotten several explanations; here are some of the more plausible: Baby N Connector (with reference to the bigger-sized N-connector used primarily for RF-connections), Bayonet N Connector, and Berkeley Nucleonics Corporation (the name of a primary equipment vendor).