Search engines work by using index software and spiders to gather information from web pages across the internet. The index software stores this information in an index database, organizing it to be searched. When a user enters a query, the search engine checks its index and returns the most relevant matching pages. One of the largest search engines is Google, which indexes over 8 billion web pages. Spiders are programs that browse the web to gather data from pages and build the search engine's database.

1. Group C,week10
How Internet Search Engines Work
・Search Engine
・Index Software
・Spider
・Link

2. Search Engine
Search engine provide information about web page . It work by storing information of many web
page , which they retrieve from WWW itself . These pages that are retrieved by a Web crawler are
analyzed to determine how it should be indexed. Data about web pages are stored in an index
database
for use in later queries .
When a user enters the query into a search engine , the search engine checks its index and
provides a
list of best matching page according to its criteria , usually with page title , summary of document
and
so on .
One of the major search engine is Google . It is most popular search engine in the world . It
registers
more than eight billion web pages .

3. Index Software
・The work of the index software is to put
the index on document and URL to
receive from agent.
・There is variety of kinds of index software
how to put the index.

4. Spider
A spider is often used by each search engine. The
Spider is a program that browses World wide
web. Spiders gather data from web pages and
automatically organize database. But the spider is
used to send spam efficient.

5. Link
Connecting, the meaning of relation.
Hyperlink
In a hypertext, it is "reference" which bears the role which ties up two or more documents. The
basis of a hypertext is made. It is also only called a "link." The link which is probably most often
used is based on URL in World Wide Web (WWW).
Deep link
Stretch a hyperlink from a certain web page directly to each contents other than the top page of
other websites (a web page, a picture, etc.). Unlike the direct link (direct link) on which a self-site is
made to display the picture of other sites etc. directly by in-line one, the act of a link anchor only
showing a pointer is pointed out.
Direct link
Stick on the web page which is in another website with the form displayed by in-line one with
reference to URL of media files, such as a picture currently exhibited by WWW of the Internet, or
stretch a link. However, since a link is not stretched in an in-line display but it has also read the file
directly, there is a field inaccurate as a term. The link (it may not be a link as mentioned above) to
the file which does not assume the direct access from the site outside is called "TYOKURIN" in the
meaning distinguished from the usual link.
Link free
Japanese English which expresses the meaning "you may link without a notice" on a website.
Although the idea [ this ] "permission should be obtained to the site administrator of a link place to
stick a hyperlink" is in a premise, this premise is called sharing of combination and information
resources of the information by a hypertext. It is far from the idea of Web. Incidentally it is in
English. If it is called link free, it will usually be interpreted by "it being released from the link",
i.e., "it not linking anywhere", or the meaning of "not being linked from where, either." If a link
freelancer's meaning is told in English It leads, if it is written as Feel free to link this site (this
page, me) etc.

6. Reference
・wikipedia
http://en.wikipedia.org/
・expertseoservices
http://www.expertseoservices.com/
・google
http://www.google.co.jp/