A automated transaction machine (3) is operative to conduct transactions in response to user interaction with a user interface. The transaction machine includes a computer (10) including at least one connected input device (21) for receiving inputs. The computer also includes at least one output device (23) for providing outputs on a screen or other output device responsive to a user interface output (15) from the computer. The computer further includes in software a transaction machine interface (TMI) (18) operative to control the user interface output. The computer further includes in software at least one event processor (16) which interfaces with the TMI. An instruction document (20) accessible by the computer includes command instructions (22). The TMI controls the user interface output responsive to the command instructions. The TMI is operative responsive to input signals and the current user interface output to selectively direct events (17) to an event processor (16) software component. The event processor is operative responsive to the event to operate transaction function devices in connection with the automated transaction machine, and to have the TMI modify the user interface output responsive to the operation of such devices.