HTC is the original design manufacturer for many Android and Windows Phone-based smartphones and PDAs. Brands that have marketed or previously marketed HTC-manufactured products include Dell, Fujitsu Siemens, HP/Compaq, i-mate, Krome, O2, Palm, Sharp Corporation, and UTStarcom. HTC also manufactures ultra-mobile PCs, and is also the manufacturer of the Nexus One and Nexus 9, a smartphone and tablet designed and branded by Google, respectively.