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A search engine or search service is a program designed to help find information stored on a computer system such as the World Wide Web, inside a corporate or proprietary network or a personal computer. The search engine allows one to ask for content meeting specific criteria (typically those containing a given word or phrase) and retrieves a list of references that match those criteria. Search engines use regularly updated indexes to operate quickly and efficiently. Without further qualification, search engine usually refers to a Web search engine, which searches for information on the public Web. Other kinds of search engine are enterprise search engines, which search on intranets, personal search engines, which search individual personal computers, and mobile search engines. However, while different selection and relevance criteria may apply in different environments, the user will probably perceive little difference between operations in these. Some search engines also mine data available in newsgroups, large databases, or open directories like DMOZ.org. Unlike Web directories, which are maintained by human editors, search engines operate algorithmically. Most web sites which call themselves search engines are actually front ends to search engines owned by other companies.
History
The very first tool used for searching on the Internet was Archie. (The name stands for "archive" without the "v", not the character from the 'Archie' comic book series). It was created in 1990 by Alan Emtage, a student at McGill University in Montreal. The program downloaded the directory listings of all the files located on public anonymous FTP (File Transfer Protocol) sites, creating a searchable database of filenames.
While Archie indexed computer files, Gopher indexed plain text documents. Gopher was created in 1991 by Mark McCahill at the University of Minnesota. (The program was named after the school's mascot). Because these were text files, most of the Gopher sites became Web sites after the creation of the World Wide Web.
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Search Engines
Science Search Engines
Using the newest free #SEO software at http://bit.ly/7wVXKK that I ever tried to grab more free traffic from the search engines. Wow John
seomaster (Christos Margetis) Mon, 04 Jan 2010 00:07:13 -0000
Using the newest free #SEO software at http://bit.ly/7wVXKK that I ever tried to grab more free traffic from the search engines. Wow John
Signed up my blog on three search engines. I'm learning web tech on the fly! (I'm such a closet geek...)
CaitlynFrost (Caitlyn Frost) Mon, 04 Jan 2010 00:01:16 -0000
Signed up my blog on three search engines. I'm learning web tech on the fly! (I'm such a closet geek...)
Tissa will pay you Referral Fees whenever you refer Qualified Users who Affiliatize Monetize their own search engines: http://bit.ly/1qDYyN
rosariolangello (Rosario Langellotti) Sun, 03 Jan 2010 23:59:55 -0000
Tissa will pay you Referral Fees whenever you refer Qualified Users who Affiliatize Monetize their own search engines: http://bit.ly/1qDYyN
I hate search engines! Why would you name a song "and and and" knowing damn well i can't find it!
akalisser (Lisa Murphy) Sun, 03 Jan 2010 23:54:51 -0000
I hate search engines! Why would you name a song "and and and" knowing damn well i can't find it!
@renedepaula Tem uma coisa que search engines não respondem tão bem, nos casos que envolvem reputação. Mas para infos e fatos, nada é melhor
fseixas (Fabio Seixas) Sun, 03 Jan 2010 23:48:26 -0000
@renedepaula Tem uma coisa que search engines não respondem tão bem, nos casos que envolvem reputação. Mas para infos e fatos, nada é melhor
New blog post: Using Search Engines To Get Lots Of Free Traffic http://bit.ly/5s2kJ8
pass0614 (Sarah Li) Sun, 03 Jan 2010 23:45:51 -0000
New blog post: Using Search Engines To Get Lots Of Free Traffic http://bit.ly/5s2kJ8
AMS Directory of Mathematics e-Print Servers - American Mathematical Society's directory of preprint and e-print servers.
Bibliographies on Mathematics - Search enabled database of citations for a large selection of mathematical specialties. Authors may add bibliographic lists or contextual references to their work.
Meta Description: [ Bibliographies on Mathematics, part of the Collection of Computer Science Bibliographies ]
Citebase Search - Experimental demonstration of the Open Citation Project. Search citations by paper or author.
CiteSeer.ist - E-print database of mathematics and science papers with citation information. Papers may be added by specifying the URL where their files reside.
Meta Description: [ CiteSeer: Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. Advantages in terms of availability, ... ]
Directory of Open Access Journals - Covers many free full-text mathematics and scientific journals (most are peer reviewed).
E-print Network - U.S. Department of Energy's search interface. Many options for fine tuning a search.
Meta Description: [ A unique Deep Web search through scientific and technical e-prints and preprints generated by researchers active in their respective fields, intended for use by other scientists, engineers, and academia. Provides a searchable gateway to thousands of science and technology Web sites and databases ... ]
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EULER - EUropean Libraries and Electronic Resources in mathematical sciences. Searches books, preprints, proceedings, serials, technical reports, theses, and web-pages.
Front for the LANL ArXiv - Easiest search access to papers posted on the preeminent Los Alamos National Lab (LANL) Physics and Mathematics preprint server (arXiv).
Hypertext Bibliography Project - Search enabled database of citations for a large selection of computer science specialties. Authors may add bibliographic lists or contextual references to their work.
Meta Description: [ Bibliographies of the Hypertext Bibliography Project, part of the Collection of Computer Science Bibliographies ]
MathNet/MPRESS - Mathematics preprint search engine. Includes some European servers not covered elsewhere.
MathSearch - Searches a collection of mathematical and statistical preprint servers and databases.
Project Euclid - Full text access to the journal Annals of Mathematics; a limited number of other journals available through paid subscriptions to Project Euclid.
SAIL-eprints - E-Print search engine. Includes some archives not indexed by other engines (see the Data Providers pull-down menu). Use as a guest or register and receive free targeted alerts and other personalized features.
Search sci.math.research - Search interface to access this newsgroup's archive.
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