Unix
Unix is a family of multitasking, multiuser computer operating systems created at Bell Labs in 1969, noted for its portability, simple abstractions, and influence on modern computing. Rewritten in the C language in the early 1970s, it spawned major lineages including System V and the Berkeley Software Distribution (BSD) and shaped standards such as POSIX and the Single UNIX Specification. The UNIX trademark is owned by The Open Group, which certifies compliant systems.
