The last major computing infrastructure paradigm shift happened in the ‘80s when “client/server” was introduced as the new way to design business applications.
With the paradigm shift from clientserver model to the cloud computing model, IT workers will need new sets of skills.
从客户/服务器模式转移到云计算，带来了IT专业技能上的变化。IT工作人员需要学习新的技能。
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Because UNIX runs many applications seemingly at the same time, it's an ideal platform for monitoring, data collection, cooperative and distributed computing, and client-server applications.