- ???? = Abacus
- ???? = Kingson, stilus driven calculator
- 1955 = Comptometer = early electromechanical desktop calculator
- 1961 = Anita VIII = first electronic (desktop) calculator ever
- 1968 = Casio 120 = early transistor with nixie tubes display desktop calculator
- 1970 = Canon Pocketronic = first portable printing calculator (no display)
- 1971 = Sharp EL-8 = palm sized calculator with nixie tubes display
- 1971 = Bowmar 901B = first real pocketable electronic calculator
- 1971 = Craig 4501 = same calculator with different badge
- 1972 = Hewlett Packard HP35 = first real scientific pocket calculator
- 1971 = Texas Instruments TI-2500 (Datamath) = first TI pocket calculator
- 1972 = Royal Digital IV = unusual stylus driven calculator
- 1972 = Sinclair Executive = incredibly thin British pocket calculator
- 1973 = Sinclair Cambridge
- 1973 = Sinclair Executive Memory
- 1974 = Sinclair Cambridge Memory
- 1975 = Gillette GPA mod.PC-1 (made by Sinclair for the American market)
- 1975 = Sinclair Oxford 100
- 1975 = Sinclair Scientific
- 1975 = Sinclair Oxford 150
- 1975 = Sinclair Oxford 200
- 1975 = Sinclair Oxford 300
- 1976 = Teal Photon (solar calculator)
- 1977 = Sinclair (pregnant) Programmable
- 1977 = Sinclair Sovereign
- 1978 = Sinclair President
- 1978 = Sinclair Enterprise
- 1978 = Sinclair Wrist calculator (kit)
- 1979 = Sinclair Enterprise programmable