This volume contains the full papers presented at HCI 2004, the 18th Annual Conference of the British HCI Group, a specialist group of the British Computer Society. People and Computers XVIII includes leading edge discussions outlining the latest research results & novel systems from the foremost research & development groups & laboratories throughout the UK & Europe. Themes covered include mobile devices, multimedia and hypermedia, wireless applications, collaborative working, graphics & virtual reality. The papers presented in this volume aim to have a strong industrial & commercial focus including contributions from leading figures from both the research & business sectors. This year?s theme, Design for Life, focuses on quality applications that make a difference to real people such: · Interactive technology supporting work, leisure, health, education & communities · Universal design that recognizes diverse user groups, including younger & older users, & wider global markets · Sustainable development