
The First workshop on the Rhocalculus took place at LORIA (Nancy,France) the 11 and 12 March, 2004. The aims of this workshop were twofold. First, to present the rhocalculus focusing on recent works and second, to understand how these works relate to other ones. Following the success of this first edition the Second workshop on the Rhocalculus took place the 30 and 31 May, 2005, at LIX  Ecole Polytechnique Palaiseau (near Paris), FRANCE and the Third workshop on the Rhocalculus took place the 23 and 24 October 2006, at King's College, London, UK. The topics of these workshops include, but are not limited to, the following aspects of the rewriting calculus:
 operational semantics
 types
 models
 higherorder unification/matching
 implementation issues
 applications
 relationship with other rewriting formalisms (lambdacalculus, higherorder rewriting, combination of lambdacalculus and rewriting,etc)