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

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

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

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

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

Dedicated to engineers past and present, this collection of slide rules and manuals have in excess of 1000 different items scanned full size and categorized by company or continent. Also offers a glossary of slide rule terms and links.

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

Munich, Germany, September 14 - 16, 2001.

An offer to trade kite aerial photographs for slide rules.

Classifies and lists slide rule and scales. Grouped by type, size, country of origin and manufacturer. Articles, a discussion forum and a section on buying and selling.