一个关于软件技术发展的ppt，非常好的阐述了中间件等关键概念及行业的现状以及发展情况，对于掌握分布式计算等相关领域的知识和进行学习大有裨益。-With regard to the development of a software technology ppt, very good set of middleware and other key concepts and the current situation and developments in the industry, for con