This chapter describes the hardware and software that you need to run DB2 OLAP Server on various operating systems. DB2 OLAP Server operates in a client/server environment as a server to clients such as the Application Manager, or DB2 OLAP Integration Server. When the relational storage manager is used, it is also a client to a relational database management system (RDBMS). This chapter also tells you what communication protocols you can use between clients and servers on various operating systems.