Third Generation (1964-1974) :: Integrated Circuits (IC)

• Microprocessor chips combines thousands of transistors, entire circuit on one computer chip.
             
• Semiconductor memory
                         
• Multiple computer models with different performance characteristics
                             
• The size of computers has been reduced drastically

Fourth Generation (1974-Present) :: Very Large-Scale Integration (VLSI) / Ultra Large Scale Integration (ULSI)

• Combines millions of transistors
                        
• Single-chip processor and the single-board computer emerged
                     
• Creation of the Personal Computer (PC)
                   
• Use of data communications
                  
• Massively parallel machine