By 1997, seven out of ten first-year students in the CUNY system were failing at least one remedial test in reading, writing or maths (meaning that they had not learnt it to high-school standard).
One of the reasons for the success of the MapReduce system is that it is designed to be a simple paradigm for writing code that needs to massively parallel.
MapReduce系统获得成功的原因之一是，它为编写需要大规模并行处理的代码提供了简单的编程模式。
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They've realized that the software that they're writing is for people, even if it's just the back end of a complicated system or a protocol that no one but other developers will ever use.