It would be foolhardy to proclaim the death of the PC in a year in which Windows 7 was key to record quarterly sales for Microsoft. The top stories of 2010, however, show that the PC for many people around the world has already become just one of several devices used to tap the Internet and a world of applications for entertainment and business - and that increasingly, the main Internet access device is not a PC. The billions of devices connected to the Internet globally are also giving rise to data and security issues for the wired and mobile worlds alike. Microsoft Chief Software Architect Ray Ozzie's farewell note to his colleagues in October warned them that the PC software giant has to brace for a "post-PC world." News flash for Mr. Ozzie & Co.: The post-PC era has already begun.