Search engines for beginners
welcome, this is a brief guide of search engines for beginners.
what is a search engine???
Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found. A search engine is really a general class of programs, however, the term is often used to specifically describe systems like Google, Bing and Yahoo! Search that enable users to search for documents on the World Wide Web.
http://www.webopedia.com/TERM/S/search_engine.html
Crawler-Based Search Engines
Crawler-based search engines use automated software programs to categorise
and survey web pages. Spiders, crawlers, robots and bots are all names of programs
used by the search engines to access your web pages. These programs will find a web page, download it
and analyse the information presented on the web page. When it finds the web
page it will be added to the search engines database. Then when a user performs
a search, the search engine will check its database of web pages for the key words
the user searched on to present a list of link results. The results (list of
suggested links to go to), are listed on pages by order of which is ‘closest’
(as defined by the ‘bots’), to what the user wants to find online. Crawler-based
search engines are constantly searching the Internet for new web pages and
updating their database of information with these new or altered pages.
source http://www.zeald.com/Blog/x_post/types-of-search-engines.html
I personally think this is the best search engine and possibly the most popular as it is very good and finds the pages that you want very easy.
example 2 - Ask Jeeves (www.ask.com)
Ask Jeeves has a very appealing home page were it tells you the weather, has a question of the day and also allows you to customize the background.
Directories
Directory is a search engine that used human editors who
decides the category the site belongs to. They place websites in categories in
the directories database. They human editors will then check the website and
give it a rank, on the information they find using a pre-defined set of rules.
source - http://www.zeald.com/Blog/x_post/types-of-search-engines.html
Yahoo has a very distinctive page consisting of lots of news and hot topics to draw in potential users and also has its very own email address creator
example 2 - Open Directory (www.dmoz.org)
Open Directory has a very simple home page but it lists a lot of categories to make it easier to search certain subjects such has sport and film
Meta Search Engines
Meta search engine just takes the results from various
search engines and combines all of the results from them to get a large listing
source http://www.zeald.com/Blog/x_post/types-of-search-engines.html
example 1 -Metacrawler (www.metacrawler.com)
Metacrawler uses the search engines from google yahoo and bing to get its results and on the home page it has poular searches but has a simple homepage layout.
example 2 -Dogpile (www.dogpile.com)
Dogpile has a very appealing homepage that is colourful and has images on. It uses Google Bing yahoo and Vandex. The name Dogpile contrasts the homepage as the search button says go fetch.
Speciality Search Engines
speciality search engines are used to cater for niche areas that are in high demand.
Froogle is googles speciality search engine just for shopping. the home page is promoting lots of differnt products as it has a list of lots of products you can buy now.
example 2 -BizRate (www.bizrate.com)
BizRate is a online shopping search engine. the home page us full of deals and new products.
- a comparison between the results returned for some example searches across the four different types of search engine; and
- at least 5 advanced search techniques, with demonstrations of how to use these techniques together with examples and explanations of them.
work still yet to do
- a comparison between the results returned for some example searches across the four different types of search engine; and
- at least 5 advanced search techniques, with demonstrations of how to use these techniques together with examples and explanations of them
