Patent US 4,134,537

A terminal for providing for the performance of transactions by a user on a step by step basis and with the terminal, including, a visual display for displaying to the user at specific steps in a transaction instructional text to the user for the performance by the user to advance the transaction on a step by step basis, a plurality of function selectors located adjacent the visual display and with each selector corresponding to the location of particular instructional text on the visual display, the visual display including at particular ones of the steps in a transaction instructional text including a choice of one or one of a plurality of the function selectors to advance the transaction to the next step, and means coupled to the function selectors for enabling and/or visually indicating only those selectors which are part of the choice for a particular one of the steps.