Bell Punch

The Bell Punch Company was a British company manufacturing a variety of business machines, most notably several generations of public transport ticket machines and the world's first desktop electronic calculator, the Sumlock ANITA.

In 1891 they began supplying ticketing machines for London General Omnibus Company.

[2] In the Second World War the company developed and manufactured a variety of military equipment, including mechanical aircraft navigation computers and naval gunnery sighting and ranging devices.

[2] In 1958 it began development of a desktop electronic calculator, which came to market as the Sumlock ANITA in 1961.

In 1972 they developed one of the first electronic pocket calculators, but were beaten to the market by Sinclair Radionics due to lack of management enthusiasm for the project.