MINIX (from Mini and Unix) is a free Unix-based operating system designed by Andrew Tanenbaum in 1987. MINIX was the very first UNIX-like operating system ported to personal computers, predating Linux. Linus Torvalds was an early enthusiast of MINIX and it inspired him to design Linux. Its latest stable release is 3.2.0 and developer snapshot is 3.2.1. Although originally designed in the university setting as a hobby of Tanenbaum, it was later released as open source and is now developed by contributors. A key difference between MINIX and Linux, is the fact that MINIX uses a microkernel, instead of a monolithic kernel, so that in theory, MINIX would be more portable than Linux, across different processor architectures.