GNU is the name of acomputeroperating system. The name is short forGNU'sNotUnix.Richard Stallman leads the GNU Project. The popularLinux operating systems made using theLinux kernel have many GNU tools too. So, many projects anddevelopers call the Linux-based operating systemsGNU/Linux.
The GNU project was started by Richard Stallman in1983. He wanted to create a computer system that was allfree and open-source software. Users could change, share and publish new work based on GNU. He and a group of developers started by creating copies of each piece ofUNIX software. The rest of GNU was thekernel, called theGNU Hurd, which is not yet finished. The more popularLinux kernel is often used instead.