%J Theoretical Computer Science %R 10.1016/0304-3975(84)90113-0 %D 1984 %V 34 %A Matthew Hennessy %A Rocco De Nicola %L eprints393 %I Elsevier %X Given a set of processes and a set of tests on these processes we show how to define in a natural way three different equivalences on processes. These equivalences are applied to a particular language CCS. We give associated complete proof systems and fully abstract models. These models have a simple representation in terms of trees. %T Testing Equivalences for Processes %P 83-133