Hewlett-Packard Company or HP is an American multinational information technology corporation headquartered in Palo Alto, California, United States. It provides products, technologies, software, solutions and services to consumers, small- and medium-sized businesses (SMBs) and large enterprises, including customers in the government, health and education sectors.

The company was founded in a one-car garage in Palo Alto by William "Bill" Redington Hewlett and Dave Packard. HP is the world's leading PC manufacturer and has been since 2007, fending off a challenge by Chinese manufacture Lenovo, according to Gartner. It specializes in developing and manufacturing computing, data storage, and networking hardware, designing software and delivering services. Major product lines include personal computing devices, enterprise, and industry standard servers, related storage devices, networking products, software and a diverse range of printers, and other imaging products. HP markets its products to households, small- to medium-sized businesses and enterprises directly as well as via online distribution, consumer-electronics and office-supply retailers, software partners and major technology vendors. HP also has strong services and consulting business around its products and partner products. It is the world's largest PC vendor by 2012 unit sales.

Major company events have included the spin-off of part of its business as Agilent Technologies in 1999, its merger with Compaq in 2002, the sponsor of Mission: Space in 2003, and the acquisition of EDS in 2008, which led to combined revenues of $118.4 billion in 2008 and a Fortune 500 ranking of 9 in 2009. In November 2009, HP announced the acquisition of 3Com, with the deal closing on April 12, 2010. On April 28, 2010, HP announced the buyout of Palm for $1.2 billion. On September 2, 2010, HP won its bidding war for 3PAR with a $33 a share offer ($2.07 billion), which Dell declined to match.

Hewlett-Packard is not affiliated with Packard Motor Car Corporation, founded by James Ward Packard and William Doud Packard, or with Packard Bell.