List of Generations of Computer and Their Year Along with the Type of Memory They have Used

Computer Generation	Memory Type Used	Year
First Generation	Thermionic valves or Vacuum Tube or Electronic valves	1946-1959
Second Generation	Transistors	1959-1965
Third Generation	Integrated Circuits / Large Scale Integrated circuits	1965-1971
Fourth Generation	Microprocessor, Chip/ Very Large Scale Integrated Circuit	1971-1980