THIS PRESENTATION is about the history of cmputers

1. SCARSDALE INTERNATIONAL SCHOOL
History of Computers
4-Z

2. COUNTING IN THE PAST

3. ABACUS
 The abacus was the first device to calculate it was a mechanical
device. About 5000 years ago it was made by a Chinese.

4. NAPIER'S BONE
 It was called Napier's bone it was used to multiply big or any kind
o f numbers it was built by mathematician John Napier.

5. PASCALINE
 It was called pascaline it looked like a shoe box but from inside it
looked like a piano a man named Blaise Pascal. It was made for
computing.

6. ANALYTICAL MACHINE
 The analytical machine was a machine that could tell the answer of
the big calculations a man named Charles Babbage built it in 1835.

7. TABULATING MACHINE
 The tabulating machine was built so people could find out the
population of their country a man named Herman Hollerith built it

8. By: Hassan Irfan And Abdullah Amir