A Unix-branded operating system developed by Sun Microsystems for their workstation and server computer systems. Usually, the SunOS name is used to refer to versions 1.0 to 4.1.4, which were based on BSD; versions 5.0 and later are based on UNIX System V Release 4, and are marketed under the brand name Solaris.
|Developed by||Sun Microsystems|
|Latest stable version||SunOS 4|
|Used by||Sun Microsystems, Oracle|