A beginner’s guide that uses the open-source Quantum GIS for its examples; the project was sponsored by the government of Eastern Cape, South Africa.
A place to view and share educational material made of small knowledge chunks called modules that can be organized as courses, books, reports, etc. Anyone may view or contribute.
Will keep a copy of any page you submit, so that you can cite it and link to that permanently archived version.
A free series of textbooks on the subjects of electricity and electronics
I can't comment on the veracity, but alternative ways of looking at electricity are interesting
