SAN FRANCISCO (AP) — The next version of Microsoft's flagship operating system will be called Windows 10, as the company skips version 9 to emphasize advances it is making toward a world centered around mobile devices and Internet services. Joe Belfiore, a Microsoft executive who oversees Windows design and evolution, said Windows 10 will offer "the familiarity of Windows 7 with some of the benefits that exist in Windows 8" to help business users make the transition. The new software represents an attempt to step back from the radical redesign that alienated many PC users when Windows 8 was introduced two years ago.