Pictures and descriptions of a number of slide rules.

Explanation of slide rule scales, FAQ about buying and selling rules, and a description of his collection.

Hyperlinked essays about slide rules and related tools, and some copyrighted downloadable files for making one's own slide rules.

Assorted slide rules for sale as well as some historical information.

List of collected sliderules.

Relates a story about how one person found a giant cache of new-in-box slide rules.

A personal compilation of information on slide rules with much information on his own collection.

Giovanni Breda shows his collection. A sheet for each rule is provided including high resolution images. Links to other collector's site are also provided.

Large categorised collection with photos and notes.

Some non-HP calculators that were introduced anywhere from centuries ago to the late 60's.

Munich, Germany, September 14 - 16, 2001.

Comprehensive annotated collection of links.

Collection of Wolf-G. Blümich. Berlin, since July 1998 periodically updated. Bilingual [mostly German, but some English].

A private collection of slide rules in excess of 500 different items scanned full size and categorized by company or continent. Also offers a comprehensive glossary of slide rule terms.

Custom slide rule for sale. Online calculations which cover the same functions available on the site. Manual included with the slide rule.

Presents Napier's Bones and the Genaille Lucas rulers in ready to print forms: Postcript and PDF.

Probably the most complete collection of Otis King's Patent Calculator (cylindrical slide rule) information on-line.

In German and English. Items for trade with descriptions of condition.

Texts and photographs.

Todd Tolhurst describes his collection, some with pictures.

Pickett Slide rules forsale. New in the box and many models available from the pocket size to 4 foot teaching rules.

Instructions on use of slide rules, and a guide to the price of slide rules.

Archives of photos of large personal collection.

An offer to trade kite aerial photographs for slide rules.

Extensive on line archive of slide rule information, plus a catalog of available rules.

A Dutch collector shares his thoughts.

Dedicated to one man's collection of slide rules (and includes a photo gallery), plus a few links for those who want to find out more about them or where to buy one.

Images grouped by type.

A collection of slide rules, with descriptions and pictures. Also, some links to other slide rule sites.

Front and back mages of some slide rules for sale.

Private trading for members of the group.

Features some slide rules used in early American and Soviet space programs.

Repository for information, pictures, history and links to sellers, other sites and experts, and an online store.

Online sales and swap meet. Private individuals only.

Slide rules and planimeters for sale.

Slide rules bought, sold and traded.

Hyperlinked essay with citations by James Redin covering the rise of the portable calculator and the demise of its predecessor.

A community of slide rule enthusiasts. Several hundred posts a month.

Membership group dedicated to the history and collection of slide rules.

Site for Jay Francis, a collector of slide rules and antique mechanical calculators. Items for sale or trade, and many related links.

A hyperlinked history of slide rules, details of the author's personal collection, and contact information.

Slide rule model information, pictures, and history from all over the world.