Using Search Engine for Search

You can use the carious options provided by a search engine to search for relevant and specific information quickly. For Example, Google provides options, such as Images, Catalogs, Groups, and Directory searches to search for specific information effectively.

Yahoo is also providing many types of search options.

Search Indexes

Search engine are programs that enable you to search for information using indexes. The indexed information can be retrieved quickly. This is similar to using the index of a book to locate the page number corresponding to a particular topic in the book.
There are three types of indexes:

1)Static Index:

Is specific to a website and updated less frequently as compared to the other types if indexes. It also known as a site map on a website. A static index allows users to manually search information through the directories of the indexed information.

2)Keyword Index :

Is based on the keywords of the Web Page. A keyword index allows users to enter any text string to be searched. This text string is then compared with the keywords maintained by the search engine for the Web page. If the keywords correspond to the searched string, the relevant indexed information is retrieved for the users.

3)Full-Text Index:

Contains information about each word of every Web page. A full-text index allows users to enter any phase to be searched. The phrase is then compared with the exact words on the Web page. If the words correspond to the searched string, the relevant indexed information is retrieved for the users.

Earlier versions of search engine would return search result only for Web pages in the HTML format. All the major present-day search engines, such as Google and alta vista, support various file formats, such as PDF, PowerPoint, Spreadsheet, and Flash for searching. The common file formats supported by search engines are:

1)Adobe Portable Document Format (.pdf)
2)Microsoft Excel PowerPoint (.ppt)
3)Microsoft Excel (.xls)
4)Adobe PostScript (.ps)
5)Microsoft Word (.doc)