Web search engine

search enginesearch enginesweb searchsearchInternet search engineInternet searchweb search enginesweb searchessearch resultsSearch engine submission
A web search engine or Internet search engine is a software system that is designed to carry out web search (Internet search), which means to search the World Wide Web in a systematic way for particular information specified in a textual web search query.wikipedia
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Web search query

querysearch querysearch queries
A web search engine or Internet search engine is a software system that is designed to carry out web search (Internet search), which means to search the World Wide Web in a systematic way for particular information specified in a textual web search query.
A web search query is a query based on a specific search term that a user enters into a web search engine to satisfy his or her information needs.

Search engine results page

SERPSearch engine result pagesearch results
The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs).
Search Engine Results Pages (SERP) are the pages displayed by search engines in response to a query by a searcher.

Deep web

invisible webDeep web (search indexing)dark (unused) address-space
Internet content that is not capable of being searched by a web search engine is generally described as the deep web.
The deep web, invisible web, or hidden web are parts of the World Wide Web whose contents are not indexed by standard web search-engines.

Web directory

directoryweb directoriesdirectories
Some search engines also mine data available in databases or open directories. The first product from Yahoo!, founded by Jerry Yang and David Filo in January 1994, was a Web directory called Yahoo! Directory.
There are two ways to find information on the Web: by searching or browsing.

Web page

webpageweb pageswebpages
The information may be a mix of links to web pages, images, videos, infographics, articles, research papers, and other types of files.
Websites and the web pages that comprise them are usually found with assistance from a search engine, but they can receive traffic from social media and other sources.

Knowbot Information Service

The Who is user search dates back to 1982 and the Knowbot Information Service multi-network user search was first implemented in 1989.
The Knowbot Information Service (KIS), also known as netaddress, is an Internet user search engine that debuted in December 1989.

Alan Emtage

It was created by Alan Emtage, Bill Heelan and J. Peter Deutsch, computer science students at McGill University in Montreal, Quebec, Canada.
Alan Emtage (born November 27, 1964) conceived and implemented the first version of Archie, a pre-Web Internet search engine for locating material in public FTP archives.

Jughead (search engine)

Jughead
The rise of Gopher (created in 1991 by Mark McCahill at the University of Minnesota) led to two new search programs, Veronica and Jughead.
Jughead is a search engine system for the Gopher protocol.

Aliweb

The web's second search engine Aliweb appeared in November 1993.
ALIWEB (Archie Like Indexing for the Web) is considered the first Web search engine, as its predecessors were either built with different purposes (the Wanderer, Gopher) or were only indexers (Archie, Veronica and Jughead).

Lycos

Lycos, Inc.Lycos CinemaLycos.com
Also in 1994, Lycos (which started at Carnegie Mellon University) was launched and became a major commercial endeavor.
Lycos, Inc., is a web search engine and web portal established in 1994, spun out of Carnegie Mellon University.

WebCrawler

One of the first "all text" crawler-based search engines was WebCrawler, which came out in 1994.
WebCrawler is a web search engine, and is the oldest surviving search engine on the web today.

JumpStation

Jonathon Fletcher
JumpStation (created in December 1993 by Jonathon Fletcher) used a web robot to find web pages and to build its index, and used a web form as the interface to its query program.
JumpStation was the first WWW search engine that behaved, and appeared to the user, the way current web search engines do.

Yahoo!

YahooYahoo! TVYahoo.com
The first product from Yahoo!, founded by Jerry Yang and David Filo in January 1994, was a Web directory called Yahoo! Directory.
It provides or provided a Web portal, search engine Yahoo! Search, and related services, including Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Finance, Yahoo! Groups, Yahoo! Answers, advertising, online mapping, video sharing, fantasy sports, and its social media website.

W3Catalog

This formed the basis for W3Catalog, the web's first primitive search engine, released on September 2, 1993.
W3 Catalog was an early web search engine, first released on September 2, 1993 by developer Oscar Nierstrasz at the University of Geneva.

Infoseek

Infoseek CorporationVerity Ultraseek
These included Magellan, Excite, Infoseek, Inktomi, Northern Light, and AltaVista.
Infoseek (also known as the "big yellow" ) was a popular internet search engine founded in 1994 by Steve Kirsch.

Form (HTML)

formweb formweb forms
JumpStation (created in December 1993 by Jonathon Fletcher) used a web robot to find web pages and to build its index, and used a web form as the interface to its query program.
For example, forms can be used to enter shipping or credit card data to order a product, or can be used to retrieve search results from a search engine.

AltaVista

Alta VistaAltaVista.com
These included Magellan, Excite, Infoseek, Inktomi, Northern Light, and AltaVista.
AltaVista was a Web search engine established in 1995.

Google

Google Inc.Google, Inc.Google LLC
It was the first search engine that used hyperlinks to measure the quality of websites it was indexing, predating the very similar algorithm patent filed by Google two years later in 1998.
Google LLC is an American multinational technology company that specializes in Internet-related services and products, which include online advertising technologies, search engine, cloud computing, software, and hardware.

Google Search

GoogleGoogle.comGoogle Instant
Around 2000, Google's search engine rose to prominence.
Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google.

Baidu

RankDexBaidu.comCHN Baidu Chart
In 1996, Robin Li developed the RankDex site-scoring algorithm for search engines results page ranking and received a US patent for the technology.
The Baidu search engine is currently the fourth largest website in the Alexa Internet rankings.

PageRank

page rankGoogle algorithmGoogle PageRank
The company achieved better results for many searches with an algorithm called PageRank, as was explained in the paper Anatomy of a Search Engine written by Sergey Brin and Larry Page, the later founders of Google.
PageRank (PR) is an algorithm used by Google Search to rank web pages in their search engine results.

Robin Li

Li YanhongRobin Yanhong Li
In 1996, Robin Li developed the RankDex site-scoring algorithm for search engines results page ranking and received a US patent for the technology.
He also invented RankDex, the first web search engine with page-ranking and site-scoring algorithms, which inspired Google's PageRank algorithm.

Mark P. McCahill

Mark McCahill
The rise of Gopher (created in 1991 by Mark McCahill at the University of Minnesota) led to two new search programs, Veronica and Jughead.
Gopher's menu-based hypermedia combined with full-text search engines paved the way for the popularization of the World Wide Web and was the de facto standard for Internet information systems in the early to mid 1990s.

Web portal

portalInternet portalportals
In contrast, many of its competitors embedded a search engine in a web portal.
A web portal is a specially designed website that brings information from diverse sources, like emails, online forums and search engines, together in a uniform way.

Sergey Brin

Sergei BrinBrinBrin Wojcicki Foundation
The company achieved better results for many searches with an algorithm called PageRank, as was explained in the paper Anatomy of a Search Engine written by Sergey Brin and Larry Page, the later founders of Google.
There he met Page, with whom he built a web search engine.