System V Release 4

System V Release 4 (SVR4) is a version of the Unix operating system released in 1989, known for integrating various features from earlier Unix versions and other systems. It introduced enhancements in networking, graphics, and system performance, making Unix more user-friendly and powerful. SVR4 established standards for compatibility and portability, influencing many later Unix-like systems, including Linux. Its modular design allowed developers to build applications that could run on different hardware, paving the way for a broader adoption of Unix in both academic and business environments.