1. INTRODUCTION 2. CATEGORIZATION OF NATURAL LANGUAGES 2.1. Word Order Typology 2.2. Transformational-Generative Grammar 3. UNIVERSAL CLAIMS 3.1. Number of Word Order Types and Universals 3.2. The ‘Universality’ of Base Rules 4. WORD ORDER CHANGE 4.1. The Direct Constituent Reorganization Hypothesis 4.2. Distribution of Language Types 5. CONCLUSION REFERENCES