بيئة

المكتبة الرقمية كاليفورنيا

California Digital Library
Established in 1997, the California Digital Library has a wholly digital charter and two complementary but distinct roles:
As the systemwide digital library, the CDL supports the University of California campus libraries in their mission of providing access to the world's knowledge for the UC campuses and the communities they serve.  In so doing, it directly supports UC's mission of teaching, research, and public service.

Learnerstv.com

This is a comprehensive site providing thousands of downloadable Video lectures, Live Online Tests,etc in the fields of Biology, Physics, Chemistry, Mathematics, Computer Science, Engineering, Medicine, Management and Accounting, Dentistry, Nursing, Psychology, History, Language Training, Literature, Law, Economics, Philosophy,Astronomy, Political Science etc FREE to its visitors... This site provides free video and audio lectures of whole courses conducted by faculty from reputed universities around the world. Science Animations provide students with fun and innovative ways of learning.