MINIX 3.2.1 is an updated version of the UNIX-like operating system based on a microkernel architecture. 3.2.1 boasts significantly more polish again in terms of base-system expansion and cleanup, in areas such as userland utilities, libraries, the build system, but also drivers and kernel improvements, various performance improvements, and more. A detailed list: support for dynamically linked executables, also build shared versions of base system libraries; remove the use of Intel segments altogether, giving a performance boost while context switching; full new clean updated NetBSD build system import....
About MINIX
MINIX is a UNIX-like computer operating system based on a microkernel architecture. It is extremely small, with the part that runs in kernel mode in about 5,000 lines of source code, while the parts that run in user mode are divided into small, insulated modules which enhance system reliability. Originally designed as an educational tool, the latest versions of MINIX are also targetted at embedded systems and low-power laptops. By the projects own admission, MINIX is work in progress and is nowhere near as mature as BSD or Linux. It is released under a BSD-type licence.