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Also known as passive backplane, backplane computer, backplane

thumb|right|300px|Major components on a PICMG 1.3 active backplane thumb|Wire-wrapped backplane from a 1960s PDP-8 minicomputer A backplane or backplane system is a group of electrical connectors in parallel with each other, so that each pin of each connector is linked to the same relative pin of all the other connectors, forming a computer bus. It is used to connect several printed circuit boards together to make up a complete computer system. Backplanes commonly use a printed circuit board, but wire-wrapped backplanes have also been used in minicomputers and high-reliability applications.