Abstract

+ ma-chines; 10,000 + are typical for medium-sized or-ganizations like a university or a bank. Current network technology is so ubiqitious and so powerfulthat we increasingly use these crowds of computers as one "technical being " instead of thinking of themas single machines. Consequently, we try to support distributed applications, not only by movingdata around but also by remote execution of downloaded/uploaded code (applets, servlets) and evendynamically migrating active objects, i.e., curently executing programs (agents, load distribution).Unfortunately, not all of these 100 + million ma-chines are compatible with each other. Currently,

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