The document discusses search engines and web directories. It explains that search engines use web crawlers to discover and index web pages in their database so that users can search for keywords. When a user searches, the search engine returns a ranked list of relevant documents. Popular search engines include Google, Bing, and Yahoo. In contrast, web directories organize websites into categories edited by humans rather than searching keywords. Some criteria for evaluating information on websites are accuracy, authority, objectivity, currency, and coverage.

1. Karina Joyce E. Limbo
BLIS-III
Prof. Farquerabao

3.  Programs that search documents for
specified keywords and returns a list of the
documents where the keywords were found.
 Search that enable users to search for
documents on the World Wide Web.

4. Discovery and Database
 A search engine finds information for its
database by accepting listings sent in by
authors wanting exposure, or by getting the
information from their "Web crawlers,"
"spiders," or "robots," programs that roam
the Internet storing links to and information
about each page they visit.

5. User Search
 Most engines allow you to type in a few
words, and then search for occurrences of
these words in their data base.

6. Presentation & Ranking
 Search engines give each document they find
some measure of the quality of the match to
your search query, a relevance score.

7.  Bing
 Google
 Yahoo!
 Windows Live Search

8.  directories where different resources are
gathered.
 web directory is not a search engine and does
not display lists of web pages based on
keywords; instead, it lists web sites by
category and subcategory.

9.  most directories are edited by humans.
 URLs are not gathered automatically by
spiders but submitted by site owners.

10. DMOZ

11. Yahoo! Directory

12.  Accuracy
-How reliable is the information provided
at the site? Have the facts been checked by
someone other than the site's author or
creator?

13.  Authority
-Is the author or editor of the Web page
qualified to write on the stated subject? What
are
his/her credentials (education, occupation, pr
evious publications)?

14.  Objectivity
-If the subject is controversial, is the
information presented fairly (both
pros and cons) or in a one-sided manner?
Examine the content carefully for possible
bias.

15.  Currency
-Is the information provided at the site up-to-
date or out-of-date?
 Coverage
-What topics (subjects) are covered by the
Web site?