Slide Rules

La mayor colección de A.W. Faber Castell en Internet, mas de 270 modelos diferentes, manuales en español para descarga, patentes, catálogos...

Fotos, manuales (con preferencia a los editados en Español) e información variada sobre Reglas de Calculo (Slide Rules).

Sito dedicato al regolo calcolatore e alla mia collezione di regoli calcolatori. In lingua italiana.

Russian Slide Rules collection by Sergei Frolov

A website devoted to my collection of over 200 (mainly) Faber-Castell slide rules. As well as scanned Faber-Castell documentation, patents, ways to determine age etc.

Collection of sliderules and downloadable documentation.

Here you will find a collection of websites about Slide Rules - an interesting mathematical tool used before the electronic calculator. You'll find information on using this old fashioned tool in addition to photos of collections of slide rules.