FOCAL Program Library

This document, DECUS No. 12-45, provides a comprehensive write-up for FOCAL 5/69, a version of the FOCAL language tailored for the 4K PDP-12A computer equipped with an incremental plotter. It outlines significant changes from previous versions, including new commands like HELLO and enhanced capabilities for commands such as ASK, DO, ERASE, and FOR. The documentation details new plotting features, provides user area and storage information, includes a table of decimal ASCII codes for FOCAL, and lists error diagnostic messages to assist in troubleshooting.