The most comprehensive, compact, and cost effective appropriate technology and sustainable living resource in the world! The AT Library contains the full text and images from over 1050 of the best books dealing with all areas of do-it-yourself technology. Portable and easy to use on 28 CDs or 2 DVDs. The AT Library is currently in use in sustainable development projects in over 74 countries worldwide. It’s like a portable internet of appropriate technology solutions!