Marconi Electronic Systems was a British company known for its work in the defense and aerospace sectors. It specialized in developing advanced electronic systems, including radar, communications, and surveillance technologies. The company played a significant role in providing equipment for military and civilian applications. In 1999, Marconi Electronic Systems became part of BAE Systems, a global defense, security, and aerospace company. This acquisition allowed BAE Systems to enhance its capabilities in electronic warfare and other high-tech defense solutions, further solidifying its position in the global defense market.