Thales is a leading defence contractor and a major player in civil and commercial markets around the world. Its businesses are organised by market segment Aerospace & Space, Defence and Security and operate as a single organisation, sharing advanced technologies and drawing on complementary capabilities to meet the specific requirements of each customer. Thales Group is a French multinational company that designs and builds electrical systems and provides services for the aerospace, defence, transportation and security markets. The headquarters are in Neuilly-sur-Seine (in the suburbs of Paris), and its stock is listed on the Euronext Paris. The professional electronics businesses of Thomson-Brandt (previously CFTH) merge with Compagnie Générale de Télégraphie Sans Fil (CSF) to form Thomson-CSF. Compagnie Française Thomson-Houston (CFTH) was formed in 1893 to operate the patents of the US Thomson-Houston Electric Corp. in the emerging market for power generation and transmission. CSF was founded in 1918 and became a pioneer in broadcasting. With its subsidiary Société Française Radioélectrique (SFR), acquired in 1957, CSF was a key player in the 1930s development of broadcasting, short wave, electro-acoustics and early radar and television systems.