are organized categories and sub-categories of links to websites.
Almost every search engine nowadays has a directory of some sort
in addition to its search service. The way most of these directories
are created is that when the search engine spiders scour the internet
and bring back information about a new webpage or website, the
search engine use its own logic to put the webpage or website
in one of the many categories it has in its directories.
are, however, two web directories that use humans to read, evaluate
and then categorize new webpages - Yahoo
and Open Directory.
Because humans do the categorization, it is often much better
than machine controlled categorization. In addition, the humans
evaluating webpages for these two directories are selective in
what sites they will put in their directories and only the better
websites make it. These factors make these two directories the
best to use.
to use directories
When you have only a vague idea of a
topic area, you can browse down through subject matter categories
and sub-categories of directories.
A high school student who has to do a term paper for her biology
class and thinks she might be interested in doing something on
genetic engineering but has no specific topic in mind and wants
to see what is out there. In
this instance the student might go to Yahoo
and click on its the Science
category in its directory listing. Within Science
she would click on Biology...then
Genetics and then Genetic
Engineering and so on. Somewhere along the way she
might find a website that interested her or find more specific
keywords with which to use in a search engine.