Unix

Unix is a powerful, multiuser, multitasking operating system originally developed in the early 1970s at Bell Labs (Bell Telephone Laboratories) by Ken Thompson, Dennis Ritchie, and others. It has profoundly influenced the design of many modern operating systems, including Linux, BSD, and macOS.

Known for its portability, modular design, and command-line interface, Unix introduced core concepts like file descriptors, pipes, and a hierarchical file system. Its philosophy of building small, reusable tools that do one thing well became foundational in software development and systems programming.