'95 => '98 => 2000
7 => 8 => 8.1
As well as remembering the second sequence follows the first.
Really, I don't mean to say it is a wonderful naming scheme or anything. I'm just less frustrated by it than by "big cats":
Kodiak, Cheetah, Puma, Jaguar, Panther, Tiger, Leopard, Snow Leopard, Lion, Mountain Lion, Mavericks
91 versions too early, since Windows 95 followed Windows 3.x.