Microsoft Corp. today announced that its Surface family of PCs is growing. Its newest model — Surface Windows 8 Pro — will be available for purchase on Feb. 9, 2013, in the United States and Canada at all Microsoft retail stores, Staples and Best Buy in the U.S., as well as from a number of locations in Canada. Powered by an Intel Core i5 processor, Surface Windows 8 Pro provides the power and performance of a laptop in a tablet package. Perfect as your one device — at home, in the office, or on the road — it can run Windows 8 applications, as well as current Windows 7 desktop applications. Starting at an estimated retail price of US$899, Surface Windows 8 Pro will be available in 64GB and 128GB models.