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PRE-ELECTRICITY ERA

  Abacus Napier Bone

  Oughtred’s Side Rue Pasca’s Cacuator

  Leibni!’ s Cacuator

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Babage Anaitica Engine "oerith’s Tabuating

#achine

  #ar$ I #ar$ II

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ELECTRICITY ERA

  ABC ENIAC%Atanaso& Berr' Co(puter) %Eectronic Nu(erica Integrator

Auto(atic Co(puter) 

E*+AC E*SAC%Eectronic *iscrete +ariabe %Eectronic *iscrete Store Auto(atic

Co(puter)  Auto(atic Co(puter)

,NI+AC %,niersa Auto(atic Co(puter)

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.O,RT" generation

 

Anaog Co(puter *igita Co(puter

"'brid Co(puter

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.O,RT" /ENERATION

 

Superco(puter #ain0ra(e Co(puters

  #ain0ra(e #inico(puters

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  #icro Co(puters Persona Co(puter

1or$station

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Specia Purpose Co(puter

/enera Purpose Co(puter