OpenVMS VAX Operating System

This document is a Software Product Description (SPD) for the OpenVMS VAX Operating System, Version 5.5-2. It outlines the system's capabilities, including support for industry standards like POSIX and X/Open XPG3, and describes key components such as the User Environment, Program Development Environment, System Management Tools, security features, and networking facilities like DECnet and VAXcluster support. It also provides detailed technical specifications for installation, disk space requirements, memory configuration, and a comprehensive list of supported hardware components, peripherals, and controllers for various VAX computer models.