Information and lists of vintage and classic calculators, primarily Hewlett-Packard and Texas Instruments.

English translation of the most important book on calculating machines "Rechenmaschinen" by Ernst Martin is illustrated on this site. Includes .pdf version of the book, pictures of the machines, production years, and articles.

Article about the history of the development of Soviet calculators, the features and interesting characteristics of the most relevant models are described.

A collection of early mechanical calculating machines and other calculating devices.

General information about the HP-75C.

Displays handheld and desktop calculators from the 1900s to the present, showing interesting features of each.

Photographs and information about HP and TI calculators, including many programs.

Matthias Wehrli's collection of HP calculators and accessories. Includes photographs and specifications for items in the collection.

Calculators from the '70s, and famous home and personal computers from '80s. Photos, historic information and links to other resources.

Bulletin board for collectors of old electronic calculators.