1. Generations & Types of Computers
B.Sc. Mathematics – Complimentary Course
Aquinas College
Eadacochin
by Raju George Michael

2. Generation Separated by Time Ideology Appearance Functioning Style
Complexity or Advancement
Raju George Michael, Aquinas College, Edacochin

3. Criteria of Generation Division
The technology or the type of component used in the processing section of a computer
Raju George Michael, Aquinas College, Edacochin

4. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
1944 to 1954
1955 to 1964
1965 to 1974
1975 till date
Not started yet
Raju George Michael, Aquinas College, Edacochin

5. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
Thermionic valve (Vacuum tube) based
Individual semi-conductor component based
Small Scale (SSI) to Large Scale (LSI) integration of semi-conductor component or generally IC based
Very Large Scale Integration (VLSI) of semi- conductor component or microprocessor based
Intelligent Processor based
Raju George Michael, Aquinas College, Edacochin

6. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
Electricity based
Electronic based
Not started yet
Raju George Michael, Aquinas College, Edacochin

7. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
Slower
fast
faster
fastest
Raju George Michael, Aquinas College, Edacochin

8. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
Large
Small
Smaller
Smallest
Raju George Michael, Aquinas College, Edacochin

9. Generations of Computer
1st Generation
2nd Generation
3rd Generation
4th Generation
5th Generation
Single Tasking & Multitasking
Multi tasking
Efficient Multitasking
Raju George Michael, Aquinas College, Edacochin

10. Types of Computers Analog Computer Super Computer Micro Computer
Laptop Computer
Digital Computer
Personal Computer
Are these computers having the same features?
What is the criteria for the categorisation?
Raju George Michael, Aquinas College, Edacochin

11. Criteria for Categorisation
Use of the Computer
Size of the Computer
Where computer is kept?
Performance of the computer
How data is processed, stored and transmitted?
Raju George Michael, Aquinas College, Edacochin

12. Types of Computer Performance of the computer
Super Computer
Mainframe Computer
Mini Computer
Micro Computer
Performance of the computer
How data is processed, stored & transmitted?
Analog Computer
Digital Computer
Hybrid Computer
Raju George Michael, Aquinas College, Edacochin

13. Performance of the computer
Super Computer
Mainframe Computer
Mini Computer
Micro Computer
Raju George Michael, Aquinas College, Edacochin

14. Super Computer Highest performing computer
Special purpose computer (Scientific & Emergency)
Single/Multi user but Multi-tasking computer
Real-time processing
Multi processing / Parallel Processing
Costliest/Non-economic computer
Raju George Michael, Aquinas College, Edacochin

15. Mainframe Computer High performance computer General purpose computer
Multi user and Multi-tasking computer
On-line processing
Multi processing / Parallel Processing
High Cost computer
Raju George Michael, Aquinas College, Edacochin

16. Mini Computer Medium performance computer General purpose computer
Multi user and Multi-tasking computer
On-line processing
Single/Multi processing
Industry-standard Economy computer
Raju George Michael, Aquinas College, Edacochin

17. Micro Computer Low performance computer
Personal/Multi purpose computer
Single user and Multi-tasking computer
Low Cost/Economic computer
Raju George Michael, Aquinas College, Edacochin

18. How data is processed, stored & transmitted?
Analog Computer
Digital Computer
Hybrid Computer
Raju George Michael, Aquinas College, Edacochin

19. Concept of Analog & Digital
Analog is gradient/ continuous (slowly increasing) in nature
Eg. Increase in speed of a vehicle, temperature rise in mercury thermometer
Digital is incremental/discrete (jumping from one value to another) in nature
Eg. Increase of runs in a cricket match, second increment in digital clock
Raju George Michael, Aquinas College, Edacochin

20. Analog Data & Digital Data
Analog data is gradient (slowly increasing)
Digital is incremental/ discrete (jumping from one value to another)
images
Raju George Michael, Aquinas College, Edacochin

21. Criteria for Categorisation
Creates a user interface towards machine
A mean to provide different type of data for processing or storage
User friendly manner
A picture
Raju George Michael, Aquinas College, Edacochin

22. Not just timely separated
Computer is an automated electronic data processing machine
Raju George Michael, Aquinas College, Edacochin

23. Summing Up
At least one device from each category is needed for a computer to be functional
Any number of devices from each category could be used
Selection and integration of these four functional types together decides the overall performance of the computer
Raju George Michael, Aquinas College, Edacochin

24. Expected Questions
At least one device from each category is needed for a computer to be functional
Raju George Michael, Aquinas College, Edacochin