FASB, or the Financial Accounting Standards Board, is the independent, private-sector organization that establishes financial accounting and reporting standards for public and private companies, as well as not-for-profit organizations, in the United States. FASB's standards are recognized as authoritative by the Securities and Exchange Commission (SEC) and the American Institute of CPAs (AICPA), making them the primary source of generally accepted accounting principles (GAAP) in the U.S..