"As we enjoy great Advantages from the Inventions of others, we should be glad of an Opportunity to serve others by any Invention of ours, and this we should do freely and generously."
-- Benjamin Franklin
by Brad Miller and David Ranum, Luther College (as remixed by Jeffrey Elkner)
by Mark Guzdial and Barbara Ericson
Hands-on introductory computer programming using Python 3.
by Peter Wentworth, Jeffrey Elkner, Allen Downey, and Chris Meyers
An introductory computer science text book using Python.
by Tony R. Kuphaldt
A free series of textbooks on the subjects of electricity and electronics