In order to provide security for the system, users will have different access levels which will determine the actions that they can perform with the system. Two levels of access will be provided, in order for fuel delivery personnel to be able to open the fuel tanks and enter how much fuel they dispensed, without being able to access the more advanced features of the system.

Data processing which occurs in a predictable, timed fashion in contrast to an interactive system wherein the system adjusts constantly to the requirements of a human user's input. Generally the input is not predictable or preset.

Programs that are implemented at the hardware level. Much of the AGS system will be designed in the form of firmware.

Physical components of a computer system which include the power supply, processing units, memory units, storage units and communication infrastructure (e.g. cables) that are needed by the system.

Information required by the system. (For example, typed text, clicked buttons.)

The communication between the user and the system.

This identifies the user to the system. It is required for access verification. Thus, the user can only use the system once they have "logged in".

List of options or actions to be performed. These will take the form of a series of buttons, each of which can be activated by moving the mouse pointer over the button and pressing ("clicking") the left mouse button.

A system where the user can choose a selection from a number of preset options in a menu.

Connection between the head office and the AGS system as well as between some components of the system which enables data to be sent back and forth.

A display asking for input from user.

Programs that do not reside directly on the hardware component of the system. Such programs are generally loaded from a magnetic storage media such a disk drive. For security and efficiency reasons, the AGS system is consists largely of firmware.

A menu which is accessed from a more general menu.

The person who use the system.