known as Digital UNIX (originally DEC OSF/1 AXP). As its original name suggests, Tru64 UNIX is based on the OSF/1 operating system. DEC's previous UNIX
iPadOS, watchOS, visionOS, and tvOS. XNU was originally developed by NeXT for the NeXTSTEP operating system. It was a hybrid kernel derived from version 2
between 1997 and 2001 after Apple's purchase of NeXT. It brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the