UNIX is a powerful multi-user and multi-task operating system, which supports a variety of processor architectures. It was first developed by ken Thompson, dennis ritchie and Douglas mcilroy in 1969 in Bell Labs Development Department of AT&T Company. After long-term development and improvement, it has grown into a mainstream operating system technology and a large family of products based on this technology. Because UNIX has the characteristics of mature technology, high reliability, strong network and database functions, outstanding expansibility and good openness, it can meet the actual needs of all walks of life, especially the needs of important business of enterprises, and has become the main workstation platform and important enterprise operation platform.

It used to be the first choice of server operating system, occupying the largest market share, but recently it lost in the competition with WINDOWS SERVER and Linux.

Detailed introduction:

Ken and Dennis first developed Unix in Bell Labs. 10, Unix was widely used in academic institutions and large enterprises. At&T Company authorizes Unix source code to academic institutions for research or teaching with low or even free license. Many organizations have expanded and improved the source code, forming a so-called Unix "variant", which further promoted the development of Unix. One of the most famous changes is the BSD product developed by the University of California, Berkeley.