This is an early example of a desktop, integrated circuit, calculator which could run off mains power or the 14 rechargeable Nickel Cadmium batteries that were housed in the calculator. The rechargeable batteries took a maximum of 15 hours to charge while the calculator was not in use. When charged the batteries provided 4-6 hours of continuous operation life. It is an example of the first ANITA electronic calculators using LSI (Large Scale Integration) integrated circuits. It featured a 10-digit display Nixie cold cathode tubes.

The original Anita calculators, the Mark VII and Mark VIII calculators, were launched simultaneously in late 1961 as the world's first all-electronic desktop calculators. They were the first of a series of desktop and hand-held electronic calculators that the company was to develop and sell under the ANITA name into the mid-1970s. They were designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock Comptometer division. In 1966 the calculator manufacturing operation of the Bell Punch Company was formed into a separate company, called Sumlock-Anita Electronics, and continued to manufacture both mechanical and electronic calculators, still marketed by its Sumlock Comptometer division. In 1973 the Sumlock Anita Electronics division was bought by its main supplier of integrated circuits, Rockwell International of the US.

Manufacturer: Sumlock
Date: 1971

This exhibit has a reference ID of CH64936. Please quote this reference ID in any communication with the Centre for Computing History.

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