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2. Figure 9-1 Logical Middleware Architecture

3. Figure 9-3 Two Tier Middleware Architecture

4. Figure 9-4 n-Tier Middleware Physical Architecture

5. Figure 9-7 SQL Middleware Architecture

6. Figure 9-9 ODBC Logical Architecture

7. Figure 9-10 Accessing Multiple ODBC Sources

8. Figure 9-11 Distributed ODBC Architecture

9. Figure 9-12 Universal Data Access Architecture

10. Figure 9-13 Distributed Computing Environment Architecture

11. Figure 9-14 Remote Procedure Call Architecture

12. Figure 9-15 Message Passing Middleware Architecture

13. Figure 9-16 Message Queuing Middleware Architecture

14. Figure 9-17 Network Message Concentration

15. Figure 9-18 Publish and Subscribe Messaging Middleware Architecture

16. Figure 9-19 Message Oriented Middleware Technology Analysis Grid

17. Figure 9-20 Distributed Transaction Process Monitor Architecture

18. Figure 9-22 ORB Architecture

19. Figure 9-13 Inter-ORB Communication

20. Figure 9-24 DCOM Architecture