Chapter 38 Materials Figure 38.1 An example procedural call graph in a conventional program. An arrow from one procedure to another means that the first procedure contains a call to the second. Figure 38.2 The example program from Figure 38.1 divided into a client and a server. Figure 38.3 (a) The original call in a conventional program, and (b) the remote version of the same call implemented with communication stubs.