This industrial design is apparent in several of Kahn's early works.

VOA: special.2009.12.13

This is just a little inelegant and so one of the things we'll introduce early on is this idea of abstraction or design whereby if you wanna represent the ideas of 0 and 1, true or false, well, let's give them a synonym like true or false.

这么说有点粗野,我要接着讲的是这种抽象的思想,或者用这个来描绘设计出,真和假的思想，我们可以给真假各指定一个同义词。

哈佛公开课 - 计算机科学课程节选