This publication contains papers from the Occam User Group (OUG). The main aim of the OUG is to act as an independent forum for the exchange of ideas, results and information in research and development of projects in the area of parallel systems design and programming using various communicating processes oriented approaches for transputer based machines. The papers collected in this volume cover topics such as: methodology of Occam programming, parallel asynchronous algorithms, control of real parallelisms in highly parallel machines of transputers, applications in scientific programming,...