rnowcnanr and Dru. create a :iowcnart, a context-Dru, and a LEVEL-U urn tor the :oiiow1ng narrative. The Quick Company is a small manufacturing operation engaged in the selling of Widgets. Customer mail orders are received in the sales order department where sales order clerks open the orders and review them for accuracy. Using an online CRT, the clerks enter the orders into the computer where they are edited by comparing them to data stored on the customer master file (a disk file). The computer displays the edited order on the clerk's terminal. The clerk reviews and accepts the order. The order is then recorded on a sales transaction tape file and the sales order master file (a disk file). As the order is recorded, it is printed on a printer in the warehouse {the picking ticket). A.copy of the sales order is also printed in the computer room and is sent to the customer (a customer acknowledgment). Entities Para Activities 1 Receives Customer Mail Order 1 Opens Mail Order and review it for accuracy Sales Order Clerk 1 Enters order into computer Computer 1 Edits by comparing Mail Order to Customer Computer 1 Displays edited Mail Order on Sales Order clerk's terminal Sales Order Clerk 1 Reviews and accepts Mail Order Computer Records Mail Order on Sales Transaction Tape and Sales Order Master File Computer 1 Prints Picking Ticket in the Warehouse Computer 1 Prints Sales Order and sends it to Customer