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.

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

Membership group dedicated to the history and collection of slide 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.

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.

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

Images grouped by type.

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