PHP- (HP-UX) is an operating system is a patented by company Hewlett-Packard Development finds. This system based operating systems, five Unix and is including four operating systems is exclusively that of the open Group certified compatibility with standard UNIX 03 is received, and legally can be a Unix to be called. The first version of this operating system was published in 1984 and its development continues. The most recent version of this operating system of the series Computer Systems HP 9000 that are based on the architecture, PA-RISC, as well as from systems HP Integrity which is based on the architecture company, Intel, are supported. HP-UX, the first operating system has been that of Access Control Lists to control access to files and directories change permissions of the traditional Unix support. Also, operating systems and pseudo-, etc. HP-UX, the first operating system which was a logical volume manager built-in. HP partner long-term with the software was and file system VxFS as the file system of the original in the HP-UX included.