Sales, purchasing, and shipping documents are all considered examples of to an accounting system.

Sales, purchasing, and shipping documents are all considered examples of source documents in an accounting system. Source documents are critical as they provide the evidence of financial transactions that have occurred. For instance, a sales invoice serves as proof of sale, while purchase orders and shipping documents verify the purchase of goods and their delivery.

These documents are essential for recording transactions accurately in the accounting system. They help maintain a clear trail of the financial transactions, making it easier to verify, audit, and analyze the financial status of a business. Proper management of source documents contributes to the overall efficiency and integrity of the accounting process.