HP OpenVMS System Services Reference Manual

This manual, titled HP OpenVMS System Services Reference Manual: A–GETUAI, is a comprehensive technical document for system and application programmers. It details various OpenVMS system services (routines) that enable basic operating system functions, including:

• Resource Control: Routines for system resource management and process communication.
• I/O Control: Functions for managing and communicating with input/output devices.
• Transaction Management: Documentation for routines used in transactional operations, such as $ABORT_TRANS and $END_TRANS.
• Resource Manager Instances (RMI): Services for declaring and interacting with resource managers, such as $DECLARE_RM and $ACK_EVENT.

The manual is structured as a technical reference, providing the function format, C prototypes, argument descriptions, descriptions of functionality, required privileges, and condition values returned for each routine. It also includes information on OpenVMS Alpha 64-bit addressing support, calling conventions, and common item code encodings.