HP OpenVMS System Services Reference Manual A - GETUAI

This document, "HP OpenVMS System Services Reference Manual: A–GETUAI," published in December 2003, describes a set of routines used by the HP OpenVMS operating system for various functions, including resource control, process communication, and I/O control.

It specifically highlights:

• Target Audience: System and application programmers who call system services.
• 64-bit Addressing Support: OpenVMS Alpha (Version 7.0 and later) supports 64-bit virtual memory, and this manual details how system services manage this, including terminology for 32-bit, 64-bit friendly, and 64-bit system services, and the use of the "_64" suffix.
• Key Services Covered (Alphabetical A-G): The extensive table of contents lists numerous system services starting with A ($ABORTTRANS, $ACKEVENT, $ACM, $ADDBRANCH, $ADDHOLDER, $ADDIDENT, $ADDPROXY, $ADJSTK, $ADJWSL, $ALLOC, $ASCEFC, $ASCTIM, $ASCTOID, $ASCUTC, $ASSIGN, $AUDITEVENT, $AVOIDPREEMPT) and continuing through G ($GETQUI, $GETRMI, $GETSYI, $GETTIM, $GETUAI), detailing their formats, arguments, descriptions, and condition values returned. These services handle tasks such as transaction management, event flag clusters, device allocation, security auditing, process creation/management, virtual address space manipulation, and system information retrieval.

The manual emphasizes that the "HP OpenVMS Industry Standard 64 Evaluation Release Version 8.1 for Integrity Servers" is for evaluation purposes only and not for production environments.