On 26 Jan 2015, Sam E wrote in
alt.home.repair:

What number would Windows ME be?

BTW, it seems like another 9x, even though it's supposedly later
than 2000.

Windows ME was the last in the line of OSs that began with DOS and
included Windows 95 and 98.

Parallel to the DOS-based Windows was the "NT" product line. It was
descended from Microsoft-IBM's joint OS/2 product. The first released
version was NT 3.1, then Windows 2000, then Windows XP, and so on.

The end of the DOS-based OSs overlapped the beginning of the NT-based
OSs. The naming conventions are pretty arbitrary and have little to do
with the order they were released.