
This is an example of a HTML caption with a link.
|
Search engines are useful when looking for targeted, complex, and general queries. It is a searchable database of Internet files collected by computer programs like wanderer, crawler, robots, worm and spiders. These programs traverses the web from link to link, identifying and reading pages. The results will be indexed and are displayed in relevancy ranked order.
The best way to do subject-oriented research is to use a subject directory. A subject directory is a service that offers a collection of links to internet resources submitted by site creators or evaluators and organized into subject categories. They are often recommended by experts.
Subject directories differ significantly in selectivity. One challenge to this is the fact that not all directory services are willing to disclose either policies or the names and qualifications of site reviewers.
There are two basic types of directories: