Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

This book constitutes the refereed proceedings of the 9th Asia-Pacific Services Computing Conference, APSCC 2015, held in Bangkok, Thailand, in December 2015.The 17 revised full papers and 6 short papers presented were carefully reviewed and selected from numerous submissions. The papers cover a wide range of topics in services computing, web services, cloud computing, security in services, and social, peer-to-peer, mobile, ubiquitous and pervasive computing.