Proceedings of the 1st International Workshop on Ontology for e-Technologies OET 2009 Acronym: OET 2009/ICEIS Event held on: May 6-7, 2009, in Milan, Italy Editors: Letizia Tanca 1 , Francesco Colace 2 , Matteo Gaeta 2 and Alfio Ferrara 3 Affiliations: 1 Politecnico di Milano, Italy , 2 Università Degli Studi di Salerno, Italy , 3 University of Milano, Italy ISBN: 978-989-8111-96-8