Learn Internet 101 http://www.internet101.org/
Browsers: http://www.internet101.org/software/browsers/
Learn the Net http://www.learnthenet.com/english/section/www.html
The Animated Internet http://www.learnthenet.com/english/animate/animate.htm
Search Engines: Find Information: How Search Engines Work http://www.learnthenet.com/english/section/digdat.html
My favorite is a search engine with results from multiple search engines called a metasearch engine http://www.dogpile.com/
Myths about computer viruses, hoaxes, urban legends http://www.vmyths.com/
Snopes - myths hoaxes, urban legends http://www.snopes.com
Living Internet http://www.livinginternet.com/
Netiquette: Learning to communicate on the Internet requires Netiquette and being aware of your surroundings. It is easy to become comfortable talking online. Remember people aren't always who they seem. Being anonymous allow others to assume character traits that are not their own. Don't put personal information on the Web without careful thought that the entire world can see it. Writing business emails it is especially important to not use your chat persona or the short cuts for words. Presenting a good business persona will be good for your career
History: Computer History Museum: A History of the Internet - Traces the phenomena from 1962 (before the term " Internet " was even coined) to the modern era.
History of Internet and WWW: The Roads and Crossroads of Internet History - Provides a history of the Internet and what led up to it in hypertext.
The World Wide Web: A very short personal history - a one page looking back on the development of the Web by Tim Berners-Lee
Browsers: Firefox - Thunderbird - Opera