The document discusses early calculating devices, including the abacus invented in China to perform simple math, Napier's Bones developed by John Napier to perform addition, subtraction, multiplication and division, the Pascaline invented by Blaise Pascal in 1642 which could do addition and subtraction, the Difference Engine designed by Charles Babbage in 1822 which could perform mathematical and astronomical calculations and store data temporarily, and the Analytical Engine also designed by Babbage which was considered the first general purpose computer with a mill calculating unit like a modern CPU.

1. Early calculating device
By :- Heli Nileshkumar Parmar

2. 1.Abacus

3. • Abacus, the first calculating
machine, was developed in
China.
• It was used to count numbers
and perform simple
calculations such as addition
and subtraction.

4. 2.Napier’s Bone

5. • Napier’s Bone was developed by
Sir John Napier.
• The device was used to perform
calculations involves addition,
subtraction, multiplication and
division.
• It was named so because the
numbers was carved on bones or
strips of wood.

6. 3. Pascaline

7. • Pascaline , one of the first
mechanical calculators, was
invented by Blaise Pascal in the
year 1642.
• Though it could perform only
addition and subtraction, yet it
is very popular.

8. 4.Difference Engine

9. • Difference Engine was designed by
Charles Babbage in the year 1822.
• Difference engine is an digital device
which could perform mathematical
and astronomical calculations.
• It was also capable of storing data
temporarily and print the output by
punching the results.

10. 5.Analytical Engine

11. • Analytical engine was designed by
Charles Babbage in the year 1822.
• It was first mechanical general
purpose computer which followed
typical IPO cycle used in modern
days computer.
• It was made up of mill, the
calculating unit called CPU in modern
computer.

12. Thank You