An Apple fan was saying that he was proud of being a pure Apple experience guy, hating having to deal with more than one operating system. After pointing out he was using both iOS and OSX, I got thinking about how many I use in my daily life, and was wondering where you are on yours:
Windows - Home desktop (Win7); Work Laptop & Workout Laptop (WinXP)
Blackberry OS - Cellphone
Android OS - Portable Media Player (Gingerbread); Tablet (Jelly Bean)
Not counting whatever OS runs my car, home theatre, home applicances, or elevators of course. :P Other more common options I suppose include OSX, iOS, Chrome, Windows Phone, Symbian, and various Open OS flavours. What's your mileage?