"Patterns for Three-Tier Client/Server Applications" Amund Aarsten, Davide Brugali, Giuseppe Menga {amund,brugali}@athena.polito.it, menga@polito.it Abstract: The three-tier client/server architecture has received increased interest in recent years, particularly for large business applications. Until now, most three-tier application have been based on relational technology. This paper presents six design patterns for the development of three-tier applications using object-oriented technology.