1. HDRUG: A Development Environment for Logic Grammars
2. Hdrug Applications
3. Command Interpreter
4. Global Variables
5. Graphical User Interface
6. Interfacing Hdrug
7. Command-line Options
8. List of Predicates
9. hdrug_call_tree: Displaying Lexical Hierarchies
10. hdrug_chart: Displaying Charts
11. hdrug_clig: Interface to CLiG
12. hdrug_feature: The Hdrug Feature Library
13. hdrug_show: Visualization
14. help: The Help System