Webopedia:
www.pcwebopaedia.com
ComputerUser.com High-Tech Dictionary:
www.computeruser.com/resources/dictionary/dictionary.html
CiteSeer:
http://citeseer.ist.psu.edu
Java programming resources:
www.apl.jhu.edu/~hall/java
http://whatis.techtarget.com
www.webstart.com/cc/standards.html
http://dmoz.org/Computers