Britain has the fourth largest electronics industry in the world. The computer sector produced an extensive range of systems, central processors and peripheral equipment, from large computers for large-scale data- processing and scientific work to mini-and microcomputers for control and automation system and for home, educational and office use. In 1993 exports reached a record level, around ₤4,000 million.
Britain makes 40 per cent of Europe's desktop computers. Nearly half of these computers and peripheral equipment intended for export are made in Scotland. Several leading overseas manufactures of data-processing equipment - for example, IBM, Unisys and Compaq - have established manufacturing plants in Britain. The biggest computer manufacturer is the largely Japanese-owned ICL. Other companies, such as Psion, have concentrated on developing new products for specialised markets. These include pocket-sized computers and notebook and pen computers.
Another sector of the industry manufactures radio communications equipment, radar, radio and sonar navigational aids for ships and aircraft, thermal imaging systems, alarms and signalling equipment, public broadcasting equipment and other capital goods. Radar was invented in Britain and British firms are still in the forefront of technical advances.