hp refurbished Hewlett-Packard, also known as HP, was founded in 1939 by Bill Hewlett and Davey Packard in Palo Alto, California. HP is a multinational American IT company. The company headquarters is in Silicon Valley, California, USA, and HP is the oldest company in the valley. It is also one of the largest companies in information technology and operates in almost all countries. The HP naming story is that the company owners (Hewlett and Packard) decided to put their letters on the company. In this way, they decided to choose HP for their company name.