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History of computer

History of computer
classification based on memory size
There are 5 types of computer
1.        
MICRO COMPUTER (1 TO 4 MB)

2.        
MINICOMPUTER (4 TO 12MB)

3.        
MIDI OR MAINFRAME COMPUTER( 2 MB TO 128 MB)

4.        
SUPER MINICOMPUTER (1 MB TO 80 MB)

5.        
MAXI OR SUPERCOMPUTER (8 MB TO 10 GB)

Generation Of Computer
first generation of computer
First generation 1950
1.        
Vacuum tubes

2.        
Very large size

1.        
Very slow speed

2.        
Less memory capacity

3.        
Less reliable

6.        
Very costly


second generation of computer
SECOND GENERATION 1960
7.        
Transistor as a computer to first generation

8.        
Small in size

9.        
Hi speed

10.     
More reliable

11.      
Increase memory capacity

12.      
Example ibm 1401, ibm 1620

Third generation of computer
1.        
Third generation of computer 1965

2.        
Small and medium scale

3.        
Small in size

4.        
Hi speed

5.        
More reliable

6.        
Increase memory capacity



4th generation of computer 1975

1.        
Medium and large scale

2.        
Small in size

3.        
Hi speed

4.        
More reliable

5.        
Increase memory capacity


fifth generation of computer 1980
6.        
Microprocessor circuit. Add computer to 4th generation

7.        
Small in size

8.        
Hi speed

9.        
More reliable

10.     
Increase memory capacity



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