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(World-Wide Web)
Yet Another Hierarchical Officious/Obstreperous/Odiferous/Organized Oracle.

(Or a member of a race of brutes in Swift's Gulliver's Travels who have the form and all the vices of man, or an uncouth or rowdy person).

Probably the biggest hierarchical index of the World-Wide Web. Originally at Stanford University, Yahoo moved to its own site in April 1995. It allows you to move up and down the heirarchy, to search it and to suggest additions. It also features "What's New", "What's Popular", "What's Cool" and a random link.
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(Yahoo, Sunnyvale, CA, The most diversified information portal on the Web. Along with search, news, sports and weather, Yahoo offers email, instant messaging, travel, auctions, classified ads, financial data, discussion groups, Web hosting and numerous other services.

It Began with Search
When it launched in 1995, Yahoo was the first Web search site to gain worldwide attention. It distinguished itself in the early days because it created its indexes manually. Instead of sending out automated spiders that roamed the Web and indexed everything in sight, indexing specialists decided what categories a Web page fit in. As a result, Yahoo called itself a "directory," rather than a search engine. As the Web grew exponentially, it became too large to index manually, and Yahoo employed automated methods.

A Student Hobby
In 1994, Stanford Ph.D candidates Jerry Yang and David Filo began indexing interesting websites as a hobby. "Jerry and David's Guide to the World Wide Web" turned into Yahoo, meaning "Yet Another Hierarchical Officious Oracle!" A very successful IPO followed in 1996, and within a few years, Yahoo became a major global brand worldwide.

From Yahoo to Oath and Altaba
Valued at USD $67 billion prior to the dot-com bust, Yahoo began to slide ever since. Although Microsoft offered $44 billion to buy the company in 2008, Yahoo declined. Nine years later in 2017, Verizon acquired Yahoo's Internet businesses for $5 billion. Combined with Verizon's acquisition of AOL in 2015, an umbrella company was formed and named Oath. Retaining their own brands, more than 50 media and tech sites are part of Oath, including Yahoo Mail, Yahoo Finance, Yahoo News, AOL, TechCrunch, tumblr and engadget.

What remained of Yahoo not acquired by Verizon was renamed Altaba ("alternate to Alibaba"), which owns roughly 15% of the Chinese Internet giant (see Alibaba).
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References in periodicals archive ?
If an attack of that magnitude happened today, Yahoo may have had to report it much faster than it did.
The search engine site is constantly experimenting with new services and apps, including a new group messaging app called Yahoo Squirrel.
Further, if no other Yahoo Japan shareholders participate in the tender offer and only the company sells 613,888,888 shares, upon consummation and based on current holdings, it would continue to hold 1,363,393,312 shares of Yahoo Japan or about 27% of the outstanding shares, after giving effect to the consummation of the concurrent self-tender by Yahoo Japan.
The addition of Yahoo to Verizon and AOL will create one of the largest portfolios of owned and partnered global brands with extensive distribution capabilities.
Verizon, he said "is looking at ways to stay competitive primarily with ATandT" and that Yahoo gives it "the ability to expand into the online content arena" and a large base of users.
Yahoo has shown a poor track record in general when it comes to managing million dollar acquisitions.
That task will be led by AOL CEO Tim Armstrong, who likely won't be joined by Yahoo CEO Marissa Mayer.
Yahoo has not yet laid out plans for its remaining investments in Alibaba and Yahoo Japan.
The deal with Verizon is likely to end the four-year reign of Yahoo boss Marissa Mayer, a former Google executive who has failed to turn the company around.
However, Yahoo's cash, its shares in Alibaba Group Holdings and Yahoo Japan, plus a portfolio of patents, will continue to be held by Yahoo, but it will change its name and begin trading as an investment company.
" Yahoo gives us scale that is what is most critical here, Marni Walden, who is head of product innovation and new business at Verizon told CNBC, adding that the company's audience will go from the millions to the billions.