Slide RulesReconstruction project started November 4, 2025

by William Lise

The Geeky & Nerdy section will have more sub-sections later, but just slide rules for now. Grayed-out (non-clickable) items below will be restored gradually.

Manufacturers

Hemmi
Ricoh
Fuji
Concise

Technology

Technology & Construction
Hemmi Slide Rule Manufacturing Process
Patents

Culture

Education
Skills, Qualifications, and Competitions
Collecting
Reference Materials & Ephemera