The document provides a comparative analysis of key aspects of the Companies Act of 1956 and the proposed Companies Bill of 2012. Some of the major changes introduced in the Bill include more comprehensive definitions, concepts of one person company and small companies, duties and roles of directors, provisions around independent directors, corporate social responsibility, e-governance, auditor accountability, and protection for minority shareholders. New concepts like serious fraud investigation office, cross-border mergers, and uniform financial year are also introduced.