Virtual Slide Rule

Learn how to use the tool that helped put people on the moon! Comes complete with instructions.

Virtual Slide Rule is a fully functional mathematical tool. Heavily used before the invention of the pocket calculator. These are hard to find these days, but we have a small collection (including a few unopened pocket rules and one eight-foot educational version that used to hang on the wall in the front of a high school chemistry or physics class). Virtual Slide Rule comes complete with instructions.

Just the thing to geek-out your iPad.