If everyone involved in the process of accounting followed their own system, or no system at all, there’s be no way to truly tell whether a company was profitable or not. Most companies follow what are called generally accepted accounting principles, or GAAP, and there are huge tomes in libraries and bookstores devoted to just this one topic. Unless a company states otherwise, anyone reading a financial statement can make the assumption that company has used GAAP.

Accounting has been defined as, by Professor of Accounting at the University of Michigan William A Paton as having one basic function: “facilitating the administration of economic activity. This function has two closely related phases: 1) measuring and arraying economic data; and 2) communicating the results of this process to interested parties.”