Euclid's Elements has been the standard in geometry textbooks for millennia, with hundreds of editions published since the ancient Greek mathematician created it at around the year 300 BCE. One edition was particularly...

Created by Frank B. Brokken of the Computing Center at the University of Groningen, this document is intended for “knowledgeable users of C (or any other language using a C-like grammar, like Perl or Java) who would like...

This free calculus textbook from Boundless Learning is based off openly available educational resources such as "government resources, open educational repositories, and other openly licensed websites." The textbook...

Users can access interactive mapping and Geographic Information Systems (GIS) data, and view or download maps and reports on California's most prominent earthquake hazards. These maps are intended to help avoid damage...

All About Circuits is a website that “provides a series of online textbooks covering electricity and electronics.” Written by Tony R. Kuphaldt, the textbooks available here are wonderful resources for students,...