This document discusses accounting theory, which provides a logical framework for accounting practice and explains existing accounting rules and procedures. It outlines key concepts in accounting theory like the transaction concept and realization concept. It also discusses the objectives of accounting theory in providing a basis for prediction and explanation of accounting events. The document notes there is no single comprehensive accounting theory and accounting can be viewed from different perspectives. It further discusses standard-setting bodies, accounting roles and frameworks, and influential publications related to the historical evolution of accounting theory.