DECUS Program Library Abstracts of Programs

This document is Addendum No. 1 to the DECUS (Digital Equipment Computer Users Society) Program Library, published in June 1966. It serves as an update to existing program catalogs, providing a categorized index of software programs for several DEC computer systems, including the PDP-1, PDP-4, PDP-5, PDP-7, and PDP-8. The document lists programs by category, such as Executive Routines, Editors, Debuggers, Punch and Loaders, Arithmetic Routines, and Hardware Control. It also includes specific detailed information, updates, and addenda notes for several key programs like FORTRAN for the PDP-1, the OPAK debugging program for the PDP-5, and various plotting routines.