This document provides an overview of key concepts in law. It defines law as rules and regulations enforced by a legislature to govern society. It discusses different types of law including constitutional law, criminal law, civil law, and more. Key differences between civil and criminal law are outlined. Sources of law are explored, including legislation, judicial precedents, equity, religion, and customs. Specific laws and court cases are referenced as examples. Classification of laws and an overview of the Sri Lankan legal system are also summarized.