HP OpenVMS System Services Reference Manual 1

This document is the HP OpenVMS System Services Reference Manual: A–GETUAI, published in July 2006.

It serves as a reference for a set of routines used by the HP OpenVMS operating system for:

• Controlling resources.
• Enabling process communication.
• Managing I/O operations.
• Performing other operating system functions.

The manual specifically notes support for 64-bit virtual memory addresses in OpenVMS Alpha (since Version 7.0) and I64 systems, indicating that many existing system services have been enhanced and new ones introduced for this capability. Services supporting 64-bit addresses often include a "_64" suffix.

It covers a range of system services alphabetically from A to GETUAI, providing detailed descriptions for each, including their format, arguments, and condition values returned.