Google disclosed in September 2011 that it "continuously uses enough electricity to power 200,000 homes", almost 260 million watts or about a quarter of the output of a nuclear power plant. Total carbon emissions for 2010 were just under 1.5 million metric tons, mostly due to fossil fuels that provide electricity for the data centers. Google said that 25 percent of its energy was supplied by renewable fuels in 2010. An average search uses only 0.3 watt-hours of electricity, so all global searches are only 12.5 million watts or 5% of the total electricity consumption by Google.
Google was initially funded by an August 1998 contribution of $100,000 from Andy Bechtolsheim, co-founder of Sun Microsystems; the money was given before Google was incorporated. Google received money from three other angel investors in 1998: Amazon.com founder Jeff Bezos, Stanford University computer science professor David Cheriton, and entrepreneur Ram Shriram. Between these initial investors, friends, and family Google raised around 1 million dollars, which is what allowed them to open up their original shop in Menlo Park, California.
More InfoPage and Brin originally nicknamed the new search engine "BackRub", because the system checked backlinks to estimate the importance of a site. Hassan as well as Alan Steremberg were cited by Page and Brin as being critical to the development of Google. Rajeev Motwani and Terry Winograd later co-authored with Page and Brin the first paper about the project, describing PageRank and the initial prototype of the Google search engine, published in 1998. Héctor García-Molina and Jeff Ullman were also cited as contributors to the project. PageRank was influenced by a similar page-ranking and site-scoring algorithm earlier used for RankDex, developed by Robin Li in 1996, with Larry Page's PageRank patent including a citation to Li's earlier RankDex patent; Li later went on to create the Chinese search engine Baidu.
More InfoGoogle indexes billions of web pages to allow users to search for the information they desire through the use of keywords and operators. According to comScore market research from November 2009, Google Search is the dominant search engine in the United States market, with a market share of 65.6%. In May 2017, Google enabled a new "Personal" tab in Google Search, letting users search for content in their Google accounts' various services, including email messages from Gmail and photos from Google Photos.
More InfoGoogle's employees are hired based on a hierarchical system. Employees are split into six hierarchies based on experience and can range "from entry-level data center workers at level one to managers and experienced engineers at level six." As a motivation technique, Google uses a policy known as Innovation Time Off, where Google engineers are encouraged to spend 20% of their work time on projects that interest them. Some of Google's services, such as Gmail, Google News, Orkut, and AdSense originated from these independent endeavors. In a talk at Stanford University, Marissa Mayer, Google's Vice-President of Search Products and User Experience until July 2012, showed that half of all new product launches in the second half of 2005 had originated from the Innovation Time Off.
More InfoGoogle data centers are located in North and South America, Asia, and Europe. There is no official data on the number of servers in Google data centers; however, research and advisory firm Gartner estimated in a July 2016 report that Google at the time had 2.5 million servers. Traditionally, Google relied on parallel computing on commodity hardware like mainstream x86 computers (similar to home PCs) to keep costs per query low. In 2005, it started developing its own designs, which were only revealed in 2009.
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