What has been the impact of computerisation on archaeology, and is it a good or bad thing? The papers in this volume derive from the 26th conference held in Barcelona in March 1998. Overall, papers deal with the advent of new techniques to overcome existing problems in archaeological analysis or data archiving. Thus the papers deal with the use of computers in archaeological fieldwork (surveying, image processing, GIS), in aiding explanation (for example statistical analysis and computer modelling) and in archiving and heritage work (databases and CRM).