Nokia announced Monday it will return to the PC market, an arena it abandoned in 1991 to focus on the growing mobile phone field. The new device, featuring integrated GPS and a claimed 12-hour battery life, will be formally unveiled Sept. 2 at Nokia World, the company’s annual expo. The netbook, to be called the “Booklet 3G,” will likely be sold through telecommunications retailers, leveraging Nokia’s strong relationships in those channels to market the device as an extension of the mobile lifestyle, Gartner PC industry analyst Ranjit Atwal told TechNewsWorld.