unix operating systems
The UNIX operating system is very widely used in education, business, science, and industry both in servers and in desktop applications. Almost 70% of the Internet's World Wide Web servers are driven by some version of UNIX or LINUX. UNIX is used in specialty desktop systems that require complex graphics or scientific processing. In servers, UNIX supports web services, database systems, advanced scientific computing, and vast communications networks. UNIX can be used in cluster systems requiring thousands of precessors or in small embedded systems involved in simple robotic applications. It is the system of choice for the vast majority of university applications.