Windows Me was still in 95/98 development line and is internally versioned as 4.2. 2000 and XP were 5.x, Vista was 6.0, Windows 7 was 6.1, Windows 8 was 6.2, and Windows 10 probably would have been internally 7.0 if they hadn't bumped the internal number forward to match.
Heh, yeah, I remember when they switched to labelling everything by year. Those of us on the development teams thought that was seriously tempting fate given our track record of routinely shipping things a year late.
Heh, no, but it was a close call. Shipped in August of 95. I was working on Office "95" at the time, and we were seriously under the gun, for a few reasons. Firstly, it came down from on high that all Office apps needed to be ported to 32-bit, as opposed to running in Win95's 16 bit subsystem (this was a massive job, and introduced numerous bugs). And to make matters worse, this was a time when software was delivered in boxes, which contained CDRoms, or 3.25" floppies, as the customer desired. Win95 had completely reserved all of msft's manufacturing capacity for like 6-7 weeks, so in order to ship in 95, we had to ship like 2 months earlier than a normal release.
https://en.wikipedia.org/wiki/List_of_Microsoft_Windows_vers...