... , some screening against electromagnetic interference, and ensures correct orientation. The part containing pin contacts is called the male connector or plug ... whole cable and connector system.D-subminiature connectors were invented by ITT Cannon, part of ITT Corporation, in 1952.[1] Cannon's ... , D=50 pin, E=9 pin), followed by the actual number of pins, followed by the gender (P=plug, S=socket).[2] For ...