Which is an external device that connects to a pc using the parallel port . the device is believed to be well - designed , and has done extremely well in statistical analyses of its output 它起源于二十世纪六十年代后期mit的计算机科学文化，在那里它用做一个荣誉的标志，用于指那些十分擅长通过巧妙的编程来解决棘手的问题的人。
In the late 60 ' s integrated theory came up , one of its ways was based on conjugate function theory introduced by fenchel , which rochafellar had developed and improved in a series of his books 六十年代后期，凸规划更完全的对偶理论出现了，其中一种方式是基于fenchel引进的共轭函数概念，这些后来在rockafellar的一系列著作中得以发展完善。
That all began to change in the late 1960s and 1970s as the seeds of globalisation began to sprout , technological advances reduced the need for agricultural labour , small manufacturers began to consider offshore sites and rural populations picked up and moved to urban areas 到了二十世纪六十年代后期和七十年代，一切都开始改变，此时，全球化的种子开始萌芽，小制造商们开始考虑向海岸撤离，部分农村人口向城市转移。
