The .

Unlike previous versions of the operating system, Windows RT runs on an ARM processor, typically found in mobile devices, instead of an x86 processor, which is used in traditional desktops and laptops. One of the major drawbacks of Windows RT is that it wont run any old software. All applications need to be downloaded from the Windows Store.

It has Microsoft Office, which is the most important reason Im upgrading from my iPad, said Joshua Jasper, a veterinary hospital manager. My biggest concern is app selection, but I know that will grow over time.

One of the accessories available for Surface is a $100 keyboard that doubles as a cover. Buyers may find it takes some getting used to as it doesnt give any tactile feedback when a key is pressed. The wireless cover is surprisingly thin and clips securely onto the tablet.

The Surface has a 10.6-inch display and weighs 1.5 pounds (680 grams). It starts at $499 with 32GB of storage.