DigitalLearn.org - Basics of computer use, online access to health information and shopping, videoconferencing - DigitalLearn has courses and resources on all of these topics and more.
TechBoomers - Online courses on computer basics, safe internet shopping, and many beginner tech topics.
Encyclopedia of Global Warming - Access from inside the library or from outside the library.
O'Reilly eBooks - eBooks that you can read directly on your screen as well as lessons, lectures, and additional material. Covers a wide range of computing topics.