Calculators

Recreation, Collecting, Computers, Calculators - Rick Furr's Calculator Reference Page. A collection of information about HP, TI and Curta calculators.

Recreation, Collecting, Computers, Calculators - Programmable Calculators. A collection of programmable and non-programmable calculators and accessories, with articles and repair notes.

Recreation, Collecting, Computers, Calculators - Calculator Technical Information. Technical information about many calculators, including chip pinouts and self-test sequences, and patent information.

The Museum of HP Calculators displays and describes older Hewlett-Packard calculators. There are also sections on calculating machines and slide rules as wellas sections for buying and selling HP calculators, an HP timeline, collecting information and a software library.