👉 A file containing a collection of data, usually in a structured format. Datafiles are commonly used to store and manipulate large amounts of data, such as financial transactions, customer information, or employee records. They can be accessed by various applications, including databases, spreadsheets, and web-based tools. For example, you might have a "datafile" called "sales_data.csv" that contains data about sales transactions from multiple customers, with columns for the date, amount spent, and customer ID.