unix

Unix is a powerful, multi-user operating system developed at Bell Labs in the early 1970s.

It became foundational to modern computing, influencing Linux, macOS, and countless other systems.

Unix emphasizes modularity—small programs that do one thing well, connected through pipes and text streams.

The term often appears in lowercase when referring to Unix-like systems generically: Most web servers run on some flavor of unix. (Capitalized Unix is the standard form and refers to the trademarked original or certified systems.)