Rationale: Base Definitions
A.1 Introduction
A.2 Conformance
A.3 Definitions
A.4 General Concepts
A.5 File Format Notation
A.6 Character Set
A.7 Locale
A.8 Environment Variables
A.9 Regular Expressions
A.10 Directory Structure and Devices
A.11 General Terminal Interface
A.12 Utility Conventions
A.13 Namespace and Future Directions
A.14 Headers