THIS INSTALLATION IS COMPOSED OF A
 
	PDP-9 DIGITAL COMPUTER ON YOUR LEFT,
 
	AND AN EAI-680 ANALOG COMPUTER ON
 
	YOUR RIGHT.
 
	     THE MUSIC IS BEING PRODUCED BY A
 
	CO-OPERATION OF BOTH COMPUTERS.  THIS
 
	IS CALLED A HYBRID COMPUTER.  THE TONES
 
	ARE GENERATED ON THE ANALOG COMPUTER,
 
	WHILE THE DIGITAL COMPUTER DETERMINES
 
	THE LENGTH AND PITCH OF EACH NOTE.  THIS
 
	INFORMATION IS CONTAINED IN A CHART OF
 
	NUMBERS SIMILAR TO THE FEW LINES BELOW:
 
 
 25   AU CLAIR DE LA LUNE
  1 3 1 349 2 220 3 175
  1 3 1 349 2 232 3 196
  1 3 1 349 2 261 3 220
  1 3 1 392 2 293 3 232 1
  1 3 1 440 2 329 3 261
  1 1 3 131
  1 3 1 392 2 293 3 232
  1 1 3 131		2
  1 3 1 349 2 261 3 220
  1 2 1 440 3 175
  1 3 1 392 2 293 3 116
  1 3 1 392 2 232 3 131 3
  1 3 1 349 2 220 3 175
  1 2 2 232 2 196
  1 2 2 220 3 175
 
 
 
	     IN ADDITION TO CONTROLLING THE
 
	MUSIC, THE DIGITAL COMPUTER IS ALSO 
 
	CONTROLLING THIS DISPLAY UNIT AND SEPARATE
 
	GAMES ON TWO TELETYPES.
 
	     ONE TELETYPE IS DEMONSTRATING A
 
	LUNAR LANDING PROBLEM.  THE OBJECT IS
 
	TO LAND THE LUNAR MODULE SAFELY FROM A 
 
	HEIGHT OF 120 MILES, GIVEN 16000 POUNDS
 
	OF FUEL AND A VARIABLE RATE OF FUEL
 
	CONSUMPTION.
 
	     THE OTHER TELETYPE IS CONTROLLING
 
	A GAME IN BUSINESS MANAGEMENT.  A
 
	HYPOTHETICAL CITY WITH AN INITIAL
 
	POPULATION, AMOUNT OF LAND, AND A GIVEN
 
	AMOUNT OF GRAIN IS POSTULATED.  THE
 
	OBJECT OF THE GAME IS TO MAKE THE CITY
 
	PROSPER.  THIS REQUIRES KNOWING HOW
 
	MUCH GRAIN TO FEED EACH PERSON, HOW
 
	MANY ACRES EACH PERSON CAN PLANT, AND
 
	HOW MUCH GRAIN IS REQUIRED TO PLANT
 
	AN ACRE.  RANDOM INPUTS TO THE PROBLEM
 
	ARE YIELD PER ACRE, RATS IN THE GRANARY,
 
	PLAGUE, AND PEOPLE ENTERING THE CITY.