Accountancy (profession) or accounting (methodology) is the measurement, disclosure or provision of assurance about information that helps managers and other decision makers make resource allocation decisions. Financial accounting is one branch of accounting and historically has involved processes by which financial information about a business is recorded, classified, summarized, interpreted, and communicated. Auditing, a related but separate discipline, is the process whereby an independent auditor examines an organizations financial statements in order to express an opinion -- that conveys reasonable but not absolute assurance -- as to the fairness and adherence to generally accepted accounting principles, in all material respects.