TOPS-20 KS/KL Model A

This manual, dated February 1983, details the installation and update procedures for TOPS-20 Version 4.1 software on DECSYSTEM-20 (Models 2040/2050) and DECSYSTEM-2020 computers. It covers initial system setup, file system initialization, tailoring the system for specific needs (such as terminal speeds, system defaults, and GALAXY batch/spooling configuration), updating previous software releases, and running the User Environment Test Package (UETP). The guide includes specific installation instructions for different tape and hardware configurations and assumes the user is responsible for site-specific system management tasks.