Computer Lecture #2 |History of Computer

History of computer

1. COMPUTER LECTURE 02

2. OUTLINE History of Computers Computer Generations

3. History of Computer ABACUS : The first calculating device ABACUS was invented in Egypt The abacus is still in use in some countries especially China, Japan Operations Addition Subtraction Division Multiplication

4. ABACUS

5. NAPIER'S, BONES Another calculating device developed in 1614 by a scientist, whose name was John, Napier. This device calls Napier's bones because it consists of rods made up of bones and could easily use for multiplication and division.

6. PASCALINE The Pascaline was designed and built by the French mathematician-philosopher Blaise Pascal between 1642 and 1644. First Mechanical calculator It could only do addition and subtraction.

7. PASCALINE

8. PUNCHED CARD 1890: Herman Hollerith American Inventor Developed devices that were able to read information which had been punched into cards automatically Developed a machine called census machine Capable of reading the numbers, characters and special symbols

9. PUNCHED CARD

10. ENIAC First general purpose electronic computer ENIAC (Electronic Numerical Integrator and Computer) Developed during World War II ENIAC filled an entire room and weighed about 30 tons Capable of performing arithmetic operations, square roots, and other calculations.

11. ENIAC

12. COMPUTERS GENERATION

13. COMPUTERS GENERATION 5 Generations of Computers Generations Time Period Technology Used 1st 1940s – 1950s Vaccum Tube based 2nd 1950s – 1960s Transistor based 3rd 1960s – 1970s Integrated Circuit based 4th 1970s – Present Microprocessor based 5th Present – Future Artificial Intelligence based

14. COMPUTERS GENERATION https://www.careerpower.in/school/computer/generation-of-computer