FaunOS is a portable (easy-to-carry), fully integrated Linux operating system with over 600 preinstalled packages. It is specifically designed to run from a portable USB memory device (such as a USB flash drive). It can also be configured to boot from other media, such as DVD, and even the internal hard drive, but we mainly focus on detachable media.
FaunOS is a live system. It's designed to run without setup on most modern x86-based systems (see minimum requirements). Because it allows you to save changes back to the USB, i.e. to customize and make it your own, FaunOS can be your primary OS. We call it your "portable operating environment", or POE, for short.
The system boots straight into graphical mode. This makes for a gentle, and largely intuitive, "getting started" learning curve for most any user--Windows users, included. (We think it's a great way to wet one's feet in Linux, even if one isn't planning on becoming a "power user.") And best of all, you'll get to keep running your POE (and all your customizations) on that new notebook you're planning to buy, for example.
FaunOS doesn't read, change or install anything on the computer's internal hard drive--unless you specifically ask it to. This means it's safe to take your USB to a computer you don't own and boot from it (see minimum requirements). When you finish, shutdown, and detach your USB key, there is no trace of any of your activity on that computer. So using FaunOS, you're protected from malware, spyware, viruses and the like that may exist on the host machine's hard drive.