Yahoo! Inc. NASDAQ: YHOO is a computer services company with a mission to "be the most essential global Internet service for consumers and businesses". It operates an Internet portal, the Yahoo! Directory and a host of other services including the popular Yahoo! Mail. It was founded by Stanford graduate students David Filo and Jerry Yang in January 1994 and incorporated on March 2, 1995. The company is headquartered in Sunnyvale, California.

According to Alexa Internet and Netcraft, both of which are Web trends companies, Yahoo! is the most visited website on the Internet today. The global network of Yahoo! websites received 3.4 billion page views per day on average as of October 2005.

Yahoo! started out as "Jerry's Guide to the World Wide Web" but eventually received a new moniker with the help of a dictionary. "Yet Another Hierarchical Officious Oracle" is a backronym for "yahoo!", but Filo and Yang insist they selected the name because they liked the word's general definition, as in Gulliver's Travels by Jonathan Swift: "rude, unsophisticated, uncouth." (For this reason the word "Yahoo!" should be pronounced with the emphasis on the first syllable.) Yahoo! itself first resided on Yang's student workstation, "Akebono," while the software was lodged on Filo's computer, "Konishiki"—both named after legendary sumo wrestlers. The "yet another" phrasing goes back at least to the Unix utility yacc, whose name is an acronym for "yet another compiler compiler".

Yahoo! had its initial public offering on April 12, 1996, raising $33.8 million dollars, by selling 2.6 million shares at $13 each.

As Yahoo!'s popularity has increased, so has the range of features it offers, making it a kind of one-stop shop for all the popular activities of the Internet. These now include: Yahoo! Mail, a Web-based e-mail service, an instant messaging client, a very popular mailing list service (Yahoo! Groups), online gaming and chat, various news and information portals, online shopping and auction facilities. Many of these are based at least in part on previously independent services, which Yahoo! has acquired - such as the popular GeoCities free Web-hosting service, Rocketmail, and various competing mailing list providers such as eGroups. Many of these take-overs were controversial and unpopular with users of the existing services, as Yahoo! often changed the relevant terms of service. An example of this would be their claiming intellectual property rights for the content on their servers, which the original companies had not done.

At the pinnacle of the Internet boom in the year 2000, the cable news station CNBC reported that Yahoo! Inc. and eBay were in discussions to initiate a 50/50 merger.

Yahoo! has partnerships with telecommunications and Internet providers - such as BT in the UK, Rogers in Canada and SBC ,Verizon and BellSouth in the US - to create content-rich broadband services to rival those offered by AOL. The company offers a branded credit card, Yahoo! Visa, through a partnership with First USA.

Beginning in late 2002, Yahoo! began to bolster its search services by acquiring relevant companies. In December 2002, Yahoo! acquired Inktomi, and in July 2003, it acquired Overture Services, Inc. and its subsidiaries AltaVista and AlltheWeb. On February 18, 2004, Yahoo! dropped Google-powered results and returned to using its own technology to provide search results.

As of 2005 Yahoo!'s news message boards have gained something of a cult following. Attached to every story is a discussion board, yet rarely are the posts pertinent to the story. Often, the posts are deliberately outrageous, attempting to provoke angry responses which, in turn, lead to more offensive posts and so on. No news story, however sacrosanct, is spared.

In June 2005 Yahoo! acquired blo.gs, a service based on RSS feed aggregation, primarily from weblogs (hence the name), which produces a simple list (and also an RSS feed thereof) of freshly updated Weblogs, ordered according to recentness of update. blo.gs was the first Internet company hosted on a domain hack Yahoo! acquired, del.icio.us being the second.

(Yahoo Information Courtesy of Wikipedia.)