Sphere's Slide Rule Universe is a repository for information about slide rules, pictures, history and links to sellers, other sites and experts, and an on-line store. Located in Kelowna, BC, Canada.
www.sphere.bc.ca/test/sruniverse.html
The Museum of HP Calculators Slide Rules In 1614, John Napier discovered the logarithm which made it possible to perform multiplications and divisions by addition and subtraction. (ie: a*b = 10^(log(a)+log(b)) and a/b = 10^(log(a)-log(b)).) This was a great time saver but there was still quite a lot of work required. The mathematician had to look up two logs, add them together and then look for ...
www.hpmuseum.org/sliderul.htm
Personal collection of slide rules, along with various resources including general background information, manuals, books, restroration tips, links and more.
