Slow response time if heavy Internet traffic or large files. So far, commercial publishers have made limited use of the Internet. Once charging mechanisms are developed and intellectual property and licencing issues are resolved commercial use of the Internet is expected to grow. There are many search sites to choose from. They vary in the size of their search database and the boolean operators used.
Search results vary greatly depending on which search engine is used.
The best advice is to develop expertise with one search engine. In particular, use alternate terms, figure out the boolean search commands, and how to limit searches with proximity connectors and other limiters. When reviewing search results, it is important to browse quite far down the list of documents to check for relevancy. Many search engines also provide organized subject guides to facilitate finding relevant websites. Alta Vista is one of the more comprehensive search engines.