Marconi Company
The Marconi Company Ltd. was founded by Guglielmo Marconi
Guglielmo Marconi
Guglielmo Marconi was an Italian inventor, known as the father of long distance radio transmission and for his development of Marconi's law and a radio telegraph system. Marconi is often credited as the inventor of radio, and indeed he shared the 1909 Nobel Prize in Physics with Karl Ferdinand...

 in 1897 as The Wireless Telegraph & Signal Company (sometimes presented as Wireless Telegraph Trading Signal Company). It was renamed Marconi's Wireless Telegraph Company in 1900 and The Marconi Company in 1963.

As the defence division of GEC since 1968 it was renamed GEC-Marconi in 1987, Marconi Electronic Systems
Marconi Electronic Systems
Marconi Electronic Systems , or GEC-Marconi as it was until 1998, was the defence arm of The General Electric Company . It was demerged from GEC and acquired by British Aerospace on November 30, 1999 to form BAE Systems...

 (MES) in 1998, which merged with British Aerospace
British Aerospace
British Aerospace plc was a UK aircraft, munitions and defence-systems manufacturer. Its head office was in the Warwick House in the Farnborough Aerospace Centre in Farnborough, Hampshire...

 to form BAE Systems
BAE Systems
BAE Systems plc is a British multinational defence, security and aerospace company headquartered in London, United Kingdom, that has global interests, particularly in North America through its subsidiary BAE Systems Inc. BAE is among the world's largest military contractors; in 2009 it was the...

 in 1999.