Tru64

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Tru64 UNIX

Tru64 UNIX is a 64-bit UNIX operating system for the Alpha microprocessor architecture, currently owned by HP. Previously, Tru64 UNIX was a product of Compaq, and before that, Digital Equipment Corporation (DEC), where it was known as Digital UNIX (formerly DEC OSF/1 AXP).

As its original name suggests, Tru64 UNIX is based on the OSF/1 operating system. DEC's previous UNIX product was known as Ultrix and based on BSD UNIX.

It is unusual among common commercial UNIX implementations in being built on the Mach kernel, sharing this characteristic with NeXTSTEP, MkLinux, and Mac OS X. It is sometimes criticized for POSIX compatibility holes.

Tru64 UNIX requires the SRM boot firmware on Alpha-based computer systems.

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