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Information Storage and Neural Control 



much of which was carried out by Jay and McCornick, we studied 

 a simulator of the air raid warning system of the United States 

 and Canada. The simulator, at System Development Corporation 

 in California, which cooperated in the study, consisted of three 

 groups of three men, each in three separate rooms. Because of 

 these three echelons, and because all members were not face to 

 face, we called this an institution rather than a group, though 

 it was a very small unit. The first room simulated a radar station 

 in the air raid warning network; the second room simulated the 

 room at headquarters in which the message from the local station 

 was received; and the third room simulated a plotting board on 

 which the location of planes was indicated at headquarters. Dots, 

 presumably representing airplanes in geographical sectors, ap- 

 peared randomly on a 21x21 matrix (Fig. 8). These dots, each 

 with an associated message number, were thrown on a board by 



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Fig. 8. Display board for Air Raid Warning Simulator. 



