Originally, Yahoo! Search started as a web directory of other websites, organized in a hierarchy, as opposed to a searchable index of pages. In the late 1990s, Yahoo! evolved into a full-fledged portal with a search interface and, by 2007, a limited version of selection-based search.

Yahoo! Search, originally referred to as Yahoo! provided Search interface, would send queries to a searchable index of pages supplemented with its directory of sites. The results were presented to the user under the Yahoo! brand. Originally, none of the actual web crawling and storage/retrieval of data was done by Yahoo! itself. In 2001 the searchable index was powered by Inktomi and later was powered by Google until 2004, when Yahoo! Search became independent. Yahoo! Search major competitors are: Google Search, Live Search and Ask Search.

From Yahoo.com Website

Who We Are

• Founded in 1994 by Stanford Ph.D. students David Filo and Jerry Yang, Yahoo! began as a hobby and has evolved into a leading global brand that has changed the way people communicate with each other, conduct transactions and access, share, and create information. Today, Yahoo! Inc. has become the world’s largest global online network of integrated services with more than 500 million users worldwide. The company is headquartered in Sunnyvale, California, with a presence in more than 20 markets and regions around the globe.

What We Do

• Yahoo! powers and delights our communities of users, advertisers, and publishers – all of us united in creating indispensable experiences, and fueled by trust.

How We Make a Difference

• Yahoo! is also committed to empowering its users and employees through programs, products, and services that inspire people to make a positive impact on their communities. Yahoo! for Good connects people with causes through our products and services, as well as through partnerships with nonprofits such as Global Green, Network for Good, and DonorsChoose. Yahoo! also channels the generosity of its employees through the Yahoo! Employee Foundation, a grassroots philanthropic organization that brings together the talents, time, and financial resources of Yahoo! employees. The foundation has given millions of dollars in grants to organizations around the world.

Other Information

• Type : Public (NASDAQ: YHOO)
• Founded : Santa Clara, California, (March 1, 1995)
• Headquarters : 701 First Avenue, Sunnyvale, California, USA
• Key people :  Carol Bartz, CEO,  Roy J. Bostock, Chairman, Jerry Yang, Co-founder,  David Filo, Co-founder
• Industry :  Internet, computer software