Raspbian is a Linux distribution based on Debian built specifically for the Raspberry Pi platform. Developers have just implemented a huge update to it, and it's now available for download and upgrade.
The Raspbian distro is one of the oldest operating systems with support for Raspberry Pi, and it was also the first OS that provided support for the second generation of the mini PC. It provides a classic desktop experience, and most users will be able to just pick it up and get things done without any problems. The desktop environment follows a classic design, and even Windows users will see some resemblance.