HP-UX is Hewlett-Packard's proprietary implementation of the Unix operating system. It runs on their PA-RISC range of processors and Intel's Itanium processor, and was also available for later Apollo/Domain systems. Earlier versions also ran on the HP 9000 Series 200, 300, and 400 computer systems based on the Motorola 68000 series of processors, as well as the HP 9000 Series 500 computers based on HP's proprietary FOCUS processor architecture.HP-UX was the first Unix to use access control lists for file access permissions rather than the standard Unix permissions system. HP-UX was also among the first Unix systems to include a built-in Logical Volume Manager, a derivative of the Veritas volume manager.
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Proprietary softwareProprietary software is any closed-source material which fundamentally means that the user does not control what it does or cannot study or edit the code. The Free Software Foundation defines it as any software that is not free software or is only partial
