Sinclair Enterprise Programmable 8 digits, red LED display Scientific programmable calculator Enterprise Programmable (July 1977) were among the last generation of calculators with red LED displays. They represented Sinclair's final attempt to regain the company's position in a market increasingly becoming dominated by more power-efficient Japanese-made LCD calculators. Neither calculator was a great success and both ended up being sold at a loss. At the time, Sinclair was being propped up by a government agency, the National Enterprise Board, hence the name of the calculators. Integrated circuits: National Semiconductor MM57146AEG/N, MM57126N, DS8874N, 1 transistor Power supply: 9v (PP3 battery). Dimensions: 65 mm x 135 mm x 23 mm. Release ~ July 1977 OVP ~ £25.00 Included THREE VOLUME COMPREHENSIVE PROGRAM LIBRARY COVERING: PHYSICS, ENGINEERING, ELECTRONICS, MATHEMATICS. GENERAL FINANCE, STATISTICS