This page is a collection of general reference data useful for OSE projects. Preference is given to open source data that can be stored and shared freely, but other data can be referenced if it is a good source of information. Electronic versions are preferred, but a village project may want to acquire paper copies for a reference library.
- MIT Open Courseware - Provides 1900 courses developed by MIT and available under Creative Commons license.
The following copyrighted books are standard references in their fields. The oldest editions might be in the public domain. If not, try to find open source data that covers the same topics. Copies of the paper versions can be found in libraries or used.
- Perry's Chemical Engineers' Handbook, 8th edition, by Perry, R.H. and Green, D.W. (Editors), McGraw-Hill, 2007.  $124.87
- Mark's Standard Handbook for Mechanical Engineers, 11th edition, by Eugene Avallone, Theodore Baumeister, Ali Sadegh, McGraw-Hill, 2006.  $159.92
- First edition was 1916 and should be public domain by now.
- The Chemical Formulary, 34 volumes, Chemical Publishing Company, 1933-1997.
- Contains formulas and recipes for all types of practical products.
The following books are old enough to likely be out of copyright, and thus in the public domain. On the other hand, being old, they may include obsolete or unsafe information. If you are unsure, check a modern reference to see if the information is still valid.
- Mechanical Engineer's Handbook 1922 Ed., Full view on Google Books 
- Handbook for Mechanical Engineers 1891 Ed.,, Full view on Google Books 
See also Steam Engine Research/Books.