Focal Library

This document describes the FOCAL Library (DECUS No. 12-10) for the PDP-12 computer. The library system consists of two parts: an initial calling routine (FOCALL) and an index routine (FOCINDEX). It allows users to store and manage up to 62 programs on a single LINC tape. The document provides instructions for initial setup, index manipulation (adding, modifying, and updating programs), and outlines the core memory mapping and operational methods of the system. It also includes technical details such as tape block assignments and program listings.