History Of Electronic Computer

SOME OF EARLIER Computer

• Zuse Z3
  
  (Germany) May 1941
  - Electro-mechanical Program
  - That Program-controlled by punched 35 mm film stock (but no conditional branch).
  
  

• Atanasoff–Berry Computer (US) 1942
  - 1st Binary Electronic Computer But Not programmable Computer.
  

•  IBM ASCC
  (US) May 1944
  - It was 1st Decimal Electro-mechanical Program
  - controlled by 24-channel punched paper tape
  - In June 1944 it was modified to an Binary Electronic Program-controlled by patch cables and switches .
  
  
•  Zuse Z4
  (Germany) March 1945
  - Binary floating point Electro-mechanical Program
  - controlled by punched 35 mm film stock
  -  In July 1946 Decimal Electronic Program controlled by patch cables and switches
  
  
• Manchester Small Scale Experimental Machine (called Baby)
  (UK) In June 1948,
  - It was Binary Electronic Stored-program in Williams cathode ray tube memory
  Modified ENIAC (US)
  -  In September 1948 Decimal Electronic Read-only stored programming mechanism using the Function Tables as program With ROM
  
  
  
• EDSAC
  (UK) May 1949
  - Binary Electronic Stored-program in mercury delay line memory
  - In October 1949 Binary Electronic Stored-program in Williams cathode ray tube memory and magnetic drum memory.
  
  
• Some Images of Computers:
  
  
• Zuse Z3
  
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• Atanasoff–Berry Computer (ABC)
  
  
  
• IBM ASCC
  
  
  
   
• Zuse Z4
  
  
  
  
  
• Manchester Small Scale Experimental Machine
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• EDSAC