21. His teaching gradually shifted to computer science, focusing on computer networks and distributed systems . 22. The proprietary networking architecture for Honeywell Bull mainframes is Distributed Systems Architecture ( DSA ). 23. There is a scalability issue in implementing such a multicasting mechanism in large distributed systems . 24. SzDG is an online architecture, run by the Laboratory of Parallel and Distributed Systems . 25. The tool was created as a research project funded by the Distributed Systems Technology Centre. 26. The units are controlled by a distributed system connected by a double multifunction vehicle bus. 27. A "'message consumer "'is a interface for distributed systems . 28. A distributed system , where thousands of users have necessary privileges, runs much better. 29. In distributed systems , maintaining sequential consistency in order to control the concurrent operations is essential. 30. Hence, it is very hard to prevent a distributed system from reaching an incorrect state.