1	Lauren is a customer of the Dondell Mail Order Catalogue Company. The company takes customer orders by post or by telephone. When a customer phones an order to the company, they are immediately asked for the customer's reference number. a. Why is the customer reference number asked for instead of the customer's name? (1 point)

2	Details of the company's stock are held on hard disc. Why is hard disc used for this purpose instead of magnetic tape? (1 point)

3	A backup copy of this information is kept on magnetic tape. Give two reasons why the backup copy is stored on magnetic tape. (2 points)

4	The company must prevent unauthorised access to its files. State two ways in which it might do this. (2 points)