GEC acquired the Marconi Company in 1968 to form GEC-Marconi. The Marconi brand was used for its defence businesses e.g. Marconi Space & Defence Systems (MSDS) and Marconi Underwater Systems Ltd (MUSL). In 1998 GEC-Marconi was renamed Marconi Electronic Systems (MES).
- The Marconi Company, accessed 24 Nov 2009