This cornucopia of math and logic problems is provided at no charge courtesy of the folks at BarCodes Inc. Designed to serve as a type of one-stop destination for those who love such activities, the site serves as a...

This free downloadable DOS program teaches hands-on PLC (programmable logic controller) programming and functions as a Allen Bradley PLC emulator. This PLC training package is actually actually three distinct programs...

About 90 "informal notes" by Kevin Brown on set theory and foundations: what is fuzzy logic, fractal logic, Cantor's diagonal proof, are all triangles isosceles, on Gauss's mountains, problems with the luminiferous...