Computer based accounting systems controls are frequently classified as general controls and application controls. Which of the following is an example of an application control? Programmers may access the computer only for testing and debugging programs.

All program changes must be fully documented and approved by the information systems manager and the user department authorizing the change.

A separate data control group is responsible for distributing output, and also compares input and output on a test basis.

In processing sales orders, the computer system compares customer and product numbers with internally stored lists before completing the order.