RPi OSW-Picked

You've picked an OS!

What's Linux?
As you don't know what Linux is, it's preferable to skip over to this section.

IWannaWindows
Oh, I see how it is. Windows only supports x86 CPU architectures (hence the popularity of it today), so if you want to port Windows onto ARM, Windows RT won't work, so consider editing ReactOS and make it ARM compatible. (If you know what to do, that is. :) It would be awesome to the community!)

Raspbian
Hello, newcomer (to Linux and/or the Raspberry Pi). To get Raspbian, the official OS for the Raspberry Pi, click here. Raspbian is a specialized version of Linux just for the Raspberry Pi!

Nobuntu
Because of Canonical's stubborn decision, they have decided to not support ARM 6 and below. We'd recommend either Raspbian or Debian, as Ubuntu is a derivative of Debian.

Fedora/Red Hat
Shoot! Red Hat is not making an ARM version available! Please try the default distro.

ArchLinux
Hmm, congrats! Arch Linux IS supported by the RasPi Foundation! Please click here for an Arch Linux download for the RasPi.