FRED

This document describes the FRED (File Replacement, Entry, and Deletion) set of subroutines designed for the PDP-12 computer to manipulate LAP6-DIAL indices. It includes details on the environment requirements, usage, entry points, and descriptions for routines such as GETFLD, READ, WRITE, LOOKUP, ENTER, REPLACE, and DELETE. The guide also provides flowcharts and code examples for these operations to assist developers in managing files on DIAL tapes.