The assertion that a problem unstated is a problem unsolved seem to have escaped many builders... All too often, design and implementation begins bef… - Douglas T. Ross

A lot of people are not familiar with the fact that when Lincoln Lab grew out of the Project Whirlwind (which were just names to me at that point) for the purpose of looking into radar air defense -- processing radar signals with the computer and then using radio controls to defend with fighters and so forth -- Whirlwind had been originally designed as an aircraft simulator for individual airplanes.

(SA) combines blueprint-like graphic language with the nouns and verbs of any other language to provide a hierarchic, top-down, gradual exposition of detail in the form of an SA model. The things and happenings of a subject are expressed in a data decomposition and an activity decomposition, both of which employ the same graphic building block, the SA box, to represent a part of a whole. SA arrows, representing input, output, control, and mechanism, express the relation of each part to the whole.

I just looked in the phone book, and called up the Executive Officer of the Servomechanisms Laboratory (Al Sise) and said, "I'm a math graduate student and would like a summer job. If you could find an electrical engineering student, I'm sure by the end of the summer we could make you an electronic calculator that would beat the pants off that little mechanical thing that Wiener has put together. Are you interested?"