OS/8 Fortran IV Plotter, Version 3C

This document describes the OS/8 FORTRAN IV Plotter, Version 3C, a set of routines for driving an incremental plotter (Calcomp 563, 565 or equivalent) under the control of OS/8 FORTRAN IV. The package allows users to request various plotting functions via CALL statements, including moving the pen, enlarging/reducing plots, retrieving pen coordinates, printing text and numbers, scaling data arrays, drawing axes, and plotting graphs. It also supports controlling the pen state, angle, and overall plot size, and allows for running background jobs when a Floating Point Processor is present. The document outlines the minimum hardware requirements (OS/8 configuration, 12K words memory, 128K words mass storage, and an X/Y incremental plotter) and optional hardware support. It also details prerequisite software (OS/8 Operating System Version 3+ and OS/8 FORTRAN IV Version 3+), update policies, and ordering information, including various media options for binaries, sources, listings, and updates.