Introduction D Continues the discussion of middleware (i. e, tools and libraries programmers used to construct client-server software) D Introduces the remote procedure call(rPc) concept, and describes a particular implementation of an rpc that uses XDr standard for data representation ) Shows how the approach simplifies the design of client-server software and makes the resulting program easier to understand2 Introduction Continues the discussion of middleware (i.e., tools and libraries programmers used to construct client-server software) Introduces the remote procedure call (RPC) concept, and describes a particular implementation of an RPC that uses XDR standard for data representation Shows how the approach simplifies the design of client-server software and makes the resulting program easier to understand