Solaris

A popular and widely-used flavor of Unix, Solaris (formerly named SunOS) is used for large-scale enterprise networks with tens of thousands of active nodes. Solaris is capable of distributed computing (using multiple computers' processors to complete a single task) and symmetrical multi-processing (running two or more processors in one computer). The OS ships on Sun's Sparc workstations along with graphical interfaces to increase user-friendliness.