WINDOWS 10
Today, Microsoft took the wraps off the next version of Windows. You’ll be able to install a free, unfinished “technical preview” version this week, or get it in final form sometime next year. It’s calledWindows 10.
(Why is it Windows 10? What happened to 9? Making sense of the Windows naming sequence is like solving one of those Mensa “What’s the pattern?” puzzles. So far, we have this: Windows 1, 2, 3, 95, 98, 2000, ME, XP, Vista, 7, 8, 10. OK, whatever.)
Windows 8, as the world now knows, was a superimposed mishmash of two operating systems. There was the touchscreen-friendly TileWorld interface, as I called it. (Microsoft, at various times, called it Modern or Metro; it has officially retired both of those terms and replaced them with nothing.)
And, underneath, there was the regular desktop:

They are quite separate, these two environments. Each has its own Help system, its own Web browser, its own email program, its own control panel, its own conventions and gestures. Worse, each runs its own kind of programs. Regular Windows programs open at the desktop, as always — but TileWorld apps open in TileWorld, with no menus overlapping windows. Like iPad apps.