DECnet/OSI for OpenVMS

This document is a customer letter introducing DECnet/OSI Version 7.0 for the OpenVMS operating system. It explains that this software is an implementation of Phase V of the Digital Network Architecture (DNA), enabling OpenVMS systems to participate in both OSI-compliant and traditional DECnet networks. The document highlights key features, including 64-bit virtual address support via $QIO, new cluster configuration options, Phase IV database integration via DECNET_REGISTER, GUI support for X.25 entities, and performance enhancements. It also provides guidance on where to locate further documentation and release notes, and encourages user feedback.