21. Pepsi left Izze at their headquarters in Boulder and left their distributing system untouched. 22. As early as 1869, the neurologist John Hughlings Jackson argued for multi-level, distributed systems . 23. If one expects real-time interaction with the distributed system , this may be very noticeable. 24. ARTAS is a distributed system composed of a number of identical subsystems co-operating together. 25. The tool was created as a research project funded by the Distributed Systems Technology Centre. 26. There is a scalability issue in implementing such a multicasting mechanism in large distributed systems . 27. The proprietary networking architecture for Honeywell Bull mainframes is Distributed Systems Architecture ( DSA ). 28. Hence, it is very hard to prevent a distributed system from reaching an incorrect state. 29. In distributed systems , maintaining sequential consistency in order to control the concurrent operations is essential. 30. E ", specifically designed for developing secure distributed systems .