Standard TECO

This document is a user's guide and language reference manual for TECO, a text editor and corrector. It covers versions TECO-11, TECO-10, and TECO-8, and was published in May 1985. The manual details TECO's commands, conventions, data structures, and various operating system characteristics. It also includes appendices on ASCII character sets, error messages, and system-specific features. The content is structured into chapters covering the basics of TECO, invoking TECO, conventions and structures, command string editing, command descriptions, and programming aids. The guide also provides detailed explanations of various commands related to file specification, text modification, searching, Q-registers, arithmetic, mode control, scope commands, and error handling. The document aims to provide a comprehensive understanding of TECO's capabilities for both basic and advanced users.