The document discusses departmental accounting for businesses with multiple departments or trading activities. It notes that large businesses often divide work into departments that each deal with different goods or services. Departmental accounting involves maintaining separate financial records for each department so their individual performance and results can be analyzed. This allows businesses to evaluate department performance, calculate manager compensation accurately, and make decisions about expanding or dropping departments. The document outlines two methods for departmental accounting - maintaining completely separate books for each department or keeping departmental accounts in columnar form within collective books. It also discusses the principles, advantages and objectives of departmental accounting.