This article is about the electronic device. For mechanical precursors to the modern calculator, see Mechanical calculator. For other uses, see Calculator (disambiguation). An electronic pocket calculator with a liquid-crystal display (LCD) seven-segment display, that can perform arithmetic operations. A modern scientific calculator with a dot matrix LCD. An electronic calculator is a small, portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid state electronic calculator was created in the 1960s, building on the extensive history of tools such as the abacus (developed around 2000 BC), and the mechanical calculator (developed in the 17th century AD). It was developed in parallel with the analog computers of the day. The pocket sized devices became available in the 1970s, especially after the first microprocessor, the Intel 4004, developed by Intel for the Japanese calculator company Busicom. ...