On distinguishing work tasks and enabling tasks

Abstract
Which behaviours of an interactive work system perform the work that the system was designed to do? And what do the other behaviours do? The idea of distinguishing work tasks and enabling tasks is presented. Suggestions are made on how to distinguish them, based on a conception for human-computer interaction. Suggestions are also made as to how the ideas may be useful in the design of interactive work systems. The ideas are illustrated by the analysis of some actual user-computer interactions in the domain of text editing.