TOPS-20 DECnet-20 Programmer's Guide and Operations Manual

This document is a programmer's guide and operations manual for DECnet-20, designed for application programmers, system operators, and system managers. It details the setup, configuration, and maintenance of DECnet-20 communications on the DECSYSTEM-20 family, including models 2020, 2040, 2050, and 2060. The manual covers system architecture (DNA), network connections, task-to-task communication, terminal operations, file transfers, and installation procedures, including the use of configuration tools like NETGEN and VNP20.