These nine papers are derived from the fourth meeting of the U.K. Chapter of Computer Applications and Quantitative Methods in Archaeology' held at Cardiff, 1999. Contents: Preface (Caitlin Buck); The sigillographic database: easier artefact analysis (Eric Cooper); Landscapes in Motion: interactive computer imagery and Neolithic landscapes of the Outer Hebrides (Vicky Cummings); BCal: the development of an interactive Internet application (G N James); An approach for integrating multisensory data: Sesklo and the Teleorman Valley (Steve Mills); Developing an archaeology soapbox and marketplace on the WWW (Leonel Morgado & Mila Simoes de Abreu); A numismatic database with icon and string-searching features (Leonel Morgado and Mario Guedes); Electronic drawing or manual drawing? Experiences from work with rock-paintings (Emma Jane Read & Christopher Chippindale); Exploring archaeometric data using projection pursuit methodology (S Westwood & M J Baxter); Beyond significant patterns towards past intentions: the location of Orcadian chambered tombs