NeXTSTEP is a discontinued object-oriented, multitasking operating system based on UNIX, which was developed by NeXT Computer in the late 1980s and early 1990s.
NeXTSTEP is a discontinued object-oriented, multitasking operating system based on UNIX. UNIX was developed by NeXT Computer in the late 1980s. UNIX was developed by NeXT Computer in early 1990s.