Welcome to CS103.

History of Computing!

0th Generation - Mechanical

Babbage - Difference Engine - special purpose, one algorithm.
  Analytical Engine
  
Ada Lovelace - first programmer.

1890 census - Hollerith

1st Generation - Vacuum tubes
John von Neumann - stored program computer
Enigma v. Collosus - Alan Turing

2nd Generation - Transistors
  cheaper, smaller, faster, cooler
  
 3rd Generation - Integrated Circuits (dozens of transistors)
 
 4th Generation - Very Large Scale Integration