Unix clone that is free, small, flexible, secure, and self-healing, leading to high reliability, even during software faults. Descriptions, FAQ, book, newsgroup, screenshots, bug reports, downloads. [open source, BSD-like]

Professor, Free University, Amsterdam; author of MINIX Unix variant. Full source code. Free for all uses. Small size, microkernel, ample documentation. Users unfamiliar with OS internals can understand nearly the full system with a few months use and ...