41. Computer scientists use languages incorporating epistemic logics ( and common knowledge ) to reason about distributed systems . 42. Viewpoint modeling has become an effective approach for dealing with the inherent complexity of large distributed systems . 43. But, the big question is should we use SVN or get some kind of distributed system ? 44. LPKF purchases a stake in LaserQuipment AG, which produces and distributes systems for Laser plastic welding. 45. "' Distributed Computing "'is a field of computer science that studies distributed systems . 46. "Distributed computing " also refers to the use of distributed systems to solve computational problems. 47. As early as 1869, the neurologist John Hughlings Jackson argued for multi-level, distributed systems . 48. This allows one to design algorithms for mutual exclusion, and tasks like debugging or optimising distributed systems . 49. Moreover, because of their complexity, it is very hard to debug and to analyze distributed systems . 50. In a distributed system the problem takes on more complexity because a global time is not easily known.