This document outlines standards for revenue recognition under AS 9. It defines revenue and lists criteria for recognizing revenue from the sale of goods, services, construction contracts, installment sales, and interest/royalties/dividends. Revenue is recognized when it is earned and realized, such as when goods are transferred or services rendered. Construction revenue can be recognized using the percentage of completion or completed contract method. Expenses are costs associated with generating revenue for a period. Gains arise from incidental transactions and are recognized upon realization, though unrealized holding gains may be recognized in some cases.