Poll: What OS do you currently use?

I use OS X with VMWare for a couple development Linux machines.

I just can't shake some of the Apple apps (e.g., Aperture, Pages, or Keynote) to be able to switch to Linux full-time.

I use all of these so I upvoted all of them.

At home I use a Windows machine, two Arch Linux boxes, and an ARM Arch distro. I have a VPS with Ubuntu on it. At work I mostly use FreeBSD as my workstation and the production server cluster uses it. We have an ubuntu box in there somewhere too. Most of the office is using mac, so if the mood strikes me to go mobile with a laptop I pick one up from a stack of the things and wonder around with a mac. My hacker space has some old sparc machines I was thinking of grabbing... but I don't need another nightstand.

If you asked me this a few years ago, I'd say I used z/OS quite a bit too.

iOS is OS X. I'd bet it's someone who either didn't realize that the two popular mobile OS's are variants of common desktops, or someone who is playing with something like BeOS or Plan 9 or some other more obscure OS.

Could be someone who is writing their own.

I use different OSes for different purposes. I use Windows in Parallels on a Mac, alongside several other Macs running various versions of OSX. I have a FreeBSD 9.1 server and an Arch Linux server, as well as a bunch of VPSes I use in my cluster.

I also have a laptop I use to run AROS and an older laptop and a couple of PCs that run Plan9. To be fair the PCs and laptop are mostly switched off, I mainly used them for distributed processing.

I desperately want to run AROS as a main OS but it's just not there yet for me. I've got haiku on my list of things to try as a personal desktop OS.

I use a mixture of iOS, stock Android and custom-built cyanogenmod firmwares on mobile devices. Granted, Android is technically Linux but I'm surprised neither that nor iOS were down as options.

I use all of these except BSD, unless OS X counts in that regard...