Multimedia
http://mc2.cchem.berkeley.edu/Chem1A/index.html

Tutorials
http://www.proaxis.com/~iguanalabs/maintut.html (Electronics)
http://www.ee.uts.edu.au/~venkat/pe_html/contents.htm (Electronic)
http://www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.html (Circuits)
http://www.play-hookey.com/digital/ (Digital Logic)

Semiconductors

http://www.mse.cornell.edu/engri111/semicon.htm
http://www.newi.ac.uk/greens/26/www-semi.htm\
http://rel.semi.harris.com/docs/lexicon/manufacture.html
http://www-mtl.mit.edu/semisubway.html

Science and Technology

HTTP://www.dcn.davis.ca.us/go/explorit/
http://www.geocities.com/CapeCanaveral/Hangar/9434/
http://www.andhratoday.com/science/st.htm
http://www.exploratorium.edu/
http://www.ece.arizona.edu/~ece422/elec/dev.htm