While search engines and subject directories both help to find information on the internet, they have several differences. Subject directories are hand picked by people and allow you to browse by category. Search engines allow access to billions of websites and use algorithms to rank the websites according to how relevant they are to your search. Quality of websites is not evaluated by search engines.
Google, Search Engines, iTunes databases that are stored on the computer
I posted the list of search engines from wikipedia in the related links box below.
There are two main types of such search engines.The first type is one that combines the results from multiple search engines for a specific query; this is called a meta search engine. For example, when you search for "dogs" on a meta search engine, it will return results about "dogs" from many different search engines such as Google, Bing, and Yahoo. Examples of meta search engines are:Polymeta.com - Combines Ask, Google, Bing, YahooDogpile.com - Combines Google, Bing, YahooMamma.com - Combines Google, Bing, YahooThe second type is one that specifies the results from search engines. Examples of 'specifiers' are:Answerbarrel.com - Uses Bing to search answer sitesSearchalldeals.com - Uses Google to search deal sitesTechcrunch.com/search - Uses Google to search TechCrunch
search engine
Search engines themselves are of many types, but usually the general term refers to an internet search engineGoogleYahooBingAskYoutube: Video Search Engine
Human powered directories are special types of search engines, organized into subject categories. The directories are smaller than most search engines and do not contain full text of the webpage they link to. Such directories are good when a user is interested in a general topic of search.
These are the search engines and directories, which provides search results for Yahoo.BingYahoo directoryGoogleWikipediaDmoz
search engines and directories
Crawler based search engines such as google .com HUman powered directories and Hybrid search engines
Google!
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Both search engines and web directories allows you to search for websites but results may vary because of the different configuration of their databases. Search engines are using crawlers / bots to read the content of websites and saving them in their database. Web directories are more organized because the websites are already categorized when submitted by humans.
results come from the Yahoo Directory
Randolph Hock has written: 'Yahoo! to the max' -- subject(s): Web search engines, Yahoo! (Computer file) 'The extreme searcher's Internet handbook' -- subject(s): Internet addresses, Computer network resources, Internet searching, Directories, Web sites, Web search engines, Handbooks, manuals 'The extreme searcher's Internet handbook' -- subject(s): Handbooks, manuals, Directories, Internet addresses, Computer network resources, Internet searching, Web sites, Web search engines
Meta Search Engines
A search directory is an online site that helps you find websites on a specific topic. There are very general directories like DMOZ to niche subject directories and local search directories as well.
Search engines have a common Web Directory Open Director Project (Dmoz) Get listed in appropriate category of Dmoz, all the search engines will list your site further. Other way is to manual submission in different web directories like Master moz, the best website, Yahoo director, Bing directory and many others.