Covers a wide range of Internet topics. Its only drawback is that it hasn't been updated in some time, which means that some of the information is dated. Still, a very good resource. Worth browsing here. For the serious researcher.
Some services are fee-based.
The Users' Guide to Web Searching Search Engine Terms Search Engine Watch Info about the way individual search services work. PLUS links to tutorials about searching. A Web site devoted entirely to finding stuff on the Net. You will need to register to use the Times' Web site. No cost involved.