For many, an interest in Human-Computer Interaction is equivalent to an interest in usability. However, using computers is only one way of relating to them, and only one topic from which we can learn about interactions between people and technology. Here, we focus on not using computers – ways not to use them, aspects of not using them, what not using them might mean, and what we might learn by examining non-use as seriously as we examine use. Author Keywords Users, non-users, non-use. ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous.