The Networker is a family of trains which operate on the UK railway system. They were built in the late 1980s and early 1990s by BREL (which became part of ABB in the 1990s). The trains were built for the Network SouthEast sector of British Rail, which is how they get their name. They are all multiple-unit trains. Subsequently Bombardier Transportation has used the Networker as the basis for its successful post-privatisation Turbostar and Electrostar units, having obtained the design through its acquisition of ADtranz which had absorbed ABB.