Special issue of personal and ubiquitous computing : papers from the Fourth International Conference on Mobile Business

The papers in this Special Issue particularly focus on the area of Business-to-Consumer Mobile Business. This issue of Personal and Ubiquitous Computing contains papers presented at the Fourth International Conference on Mobile Business (ICMB05) which was held in Sydney, Australia, 11–13 July 2005 and related papers. Eight of the contributions are extended versions of papers from ICMB05 and a further two papers are invited and peer-reviewed issue related papers.