... cable and connector system.D-subminiature connectors were invented by ITT Cannon, part of ITT Corporation, in 1952.[1] Cannon's part ... , D=50 pin, E=9 pin), followed by the actual number of pins, followed by the gender (P=plug, S=socket).[2] ... D-subs are currently being manufactured in a broad range of configurations by other companies, including Amphenol, Conec, Teledyne Reynolds, Assmann Electronics ...