Tiny Core Linux (TCL) is a minimal Linux operating system focusing on providing a base system using BusyBox and FLTK. The lead developer of the project is Robert Shingledecker. The distribution is notable for its size under 12MB, with additional functionality provided by extensions of which there are more than 3200. Tiny Core Linux is Free open source software and is licensed under the GNU General Public License v2. Micro Core Linux is a smaller variant of Tiny Core without a graphical desktop.