Sect$10$n ETo sift through the massive amounts of infor$-$

mation available on the Web and locate pertinent information

about a topic, Web surfers utilize programs called search

$.$ These special programs have four major

components. A Web

$,$ also called a Web

spider, is automated to methodically visit Web sites and gather Web

pages. A search engine

fulls keywords from

the gathered pages and stores them in $a(n)$

The search engine's query

accepts one or

more words called search

looks them up

in the database, and produces a list of relevant Web sites. There

are a number of ways to narrow searches and produce more

targeted results, such as using

J operators

or putting exact phrases in

The order

in which Web sites are returned in response to your query is

dependent on relevancy criteria, such as keyword matches and

popularity.