Guide to the DEC Text Processing Utility

This document serves as both an introduction and a technical guide for the DEC Text Processing Utility (DECTPU). It covers key topics including:

• Getting Started: Invoking DECTPU, utilizing DCL command procedures, and working with journal files for data recovery.
• Data Types: An in-depth look at DECTPU's extensive set of data types (such as arrays, buffers, markers, patterns, and windows).
• Language Elements: Detailed descriptions of the DECTPU language, including lexical elements, constants, variables, operators, and expressions.
• Program Development: How to develop, compile, execute, and debug DECTPU programs, including creating section files and initialization files.
• DECwindows Integration: Programming considerations for using DECTPU in the DECwindows environment, including widget support and callbacks.

It is intended for both new users and experienced programmers looking to extend the editor or create custom applications.