[citation needed] HP-UX was also among the first Unix systems to include a built-in logical volume manager.

[citation needed] HP has had a long partnership with Veritas Software, and uses VxFS as the primary file system.

It is one of three commercial operating systems that have versions certified to The Open Group's UNIX 03 standard (the others are macOS and AIX).

HP-UX 11i v3 scales as follows (on a SuperDome 2 with 32 Intel Itanium 9560 processors): The 11i v2 release introduced kernel-based intrusion detection, strong random number generation, stack buffer overflow protection, security partitioning, role-based access management, and various open-source security tools.

HP classifies the operating system's security features into three categories: data, system and identity:[5] Release 6.x (together with 3.x) introduced the context dependent files (CDF) feature, a method of allowing a fileserver to serve different configurations and binaries (and even architectures) to different client machines in a heterogeneous environment.

A directory containing such files had its suid bit set and was made hidden from both ordinary and root processes under normal use.