Information about various HP calculator models, with photographs. Includes instructions on using some of the special functions of some models.

Some articles about Russian made calculators, including undocumented features and error conditions.

An A-Z index of manufacturers, with product photographs, and a timeline of model releases.

Technical information about hardware, interfacing, and programming of this vintage device. Includes a construction project for a storage device to emulate the original FA-3 cassette interface.