This chapter discusses key accounting principles including concepts, conventions, and standards. It defines accounting principles as the rules for recording transactions globally. Concepts refer to assumptions accounting is based on, like separate entity and going concern, while conventions are customs that help prepare statements, such as consistency. The Institute of Chartered Accountants of India issues standards and established an Accounting Standards Board to formulate them. Finally, it compares double and single entry systems, and explains cash and mercantile systems of accounting.