GET TO KNOW THE C.I.A BETTER THAN YOU THOUGHT YOU KNOW
				B: The Abacus, Napier bones and the Analytical engine were all non-electronic tools that would simplify arithmetic.  
 
Representing numbers using an abacus 
 
  
 
  
 
  
 
  
 
  
 
1st Generation computers (1940 - 1958) 
 
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