Early Electronic Calculator Pocket Calculator Photo Gallery

TwinScents Bath Math 1975~ Logic Technology: Display: Why do people make these things? Why do people buy them? Why did I? Almost identical in shape and keyboard layout to the apf Mark 40.

Unitrex Mini Handy 80M 1975 Logic Technology: LSI Display: LED

apf Mark 40 1975 Logic Technology: LSI Display: LED

apf Mark 51 1975 Logic Technology: LSI Display: VFM

Hewlett-Packard 21 1976 Logic Technology: LSI-2 Display: LED

Microlith Memory 4 / 113G 1976 Logic Technology: LSI Display: VFM

Sharp EL-104 1976 Logic Technology: LSI Display: LED

Commodore GL-997 RF 1977 Logic Technology: LSI Display: VFM

National Semiconductor International Computer 1977 Logic Technology: LSI-blob Display: LED The same functionality and case design as the Novus 6010, but reimplemented with the LSI chip directly mounted on the PCB and a blob cover/seal, and sold under the National Semiconductor name.

RT 3 1977 Logic Technology: LSI Display: VFM

Texas Instruments TI-57 1977 Logic Technology: LSI Display: LED

Sharp EL-8131 1978 Logic Technology: LSI Display: VFM