Simple and effective feedback loop for ATM transactions with a text message – the speed of delivery means that the text message confirming the withdrawal arrives within seconds of the withdrawal. This is nothing new for most readers – but can provide an important support mechanism for technologically, or textually illiterate users – who can then take task-related information with them to a literate person.

Interactions with an ATM are typically designed to be completed in one go – the user is not expected to return to complete other parts of the task. Thought for today what kind of processes could include multiple visits to an ATM? Hint: ones where an illiterate person takes information away, returning after having support from a more literate peer.