This document provides an introduction to the legal system and contract act in Pakistan. It discusses the sources of law including formal sources like statutes and court decisions, as well as material sources like historical customs and legal precedents. It describes the different branches of the judiciary including the Supreme Court, High Courts, and lower courts. It also explains the process of legislation through parliament, where a bill is introduced and debated before becoming law with the president's approval. Finally, it provides definitions and essential elements of a valid contract according to the Contract Act of 1872.