Update to DECUS PDP-8, FOCAL8, BASIC8, PDP-12 Catalog

This document serves as an update (dated May 1975) to the DECUS library catalog for PDP-8, FOCAL8, BASIC8, PDP-12, and associated hardware and software. It contains essential General Information regarding payment, service charges for write-ups and tapes, and instructions for European and Australian users. The document provides a comprehensive Category Index for each system, listing programs by their category (such as Programming Language, Data Management, Display, or Statistics), along with their unique DECUS number and title. Additionally, it includes detailed Service Charge tables that outline costs for documentation, paper tape, listing, and various tape formats.