Two market research firms have reported Apple's growth in the PC market at 16 percent. IDC figures show that Apple's increased sales put Dell to shame, with the market leader gaining just 6.4% in 2006.

Like IDC, Gartner has the top four players in the US PC market as Dell (32 percent), HP (18.9 percent), Gateway (6.2 percent) and Apple (4.6 percent).