Mark Apperley has been working in the field of HCI for more than 30 years. In the 1970's he worked on the MINNIE interactive CACD system with Bob Spence, pioneering a range of interaction and information visualisation techniques, including dynamic exploration and percent done indicators. Also with Bob Spence he devised the bifocal display (1980) and the Lean Cuisine notation for menu description (1988). He has also carried out research on systems supporting collaborative work, and on techniques for large screen interaction. More recently his attention has focussed on energy management, including visualisation, human interaction, and system modelling. Mark is Professor of Computer Science at the University of Waikato, Hamilton, New Zealand.