Invention_of_the_Computer

1.

The Invention of the Computer
How a machine changed the world
A short report in eight slides

2.

What Is a Computer?
• A computer is a machine
• It stores information
• It works with numbers and words
• It follows instructions
• People use computers every day
A woman using a laptop computer

3.

Before Computers
• People counted with fingers and
stones
• They used the abacus
• They made mechanical calculators
• People wanted faster ways to
calculate
An abacus

4.

Charles Babbage and Ada Lovelace
• Charles Babbage designed a
mechanical computer
• It was called the Analytical Engine
• It was never finished
• Ada Lovelace wrote notes about it
• Many people call her work the first
computer program
A trial model of the Analytical Engine

5.

The First Electronic Computers
• The first electronic computers
appeared in the 1940s
• ENIAC was one of the first
• It was very big
• It used many vacuum tubes
• It could calculate very fast
ENIAC

6.

From Big Machines to Personal Computers
• Early computers were big and
expensive
• In the 1970s and 1980s, computers
became smaller
• Apple and IBM made famous
personal computers
• People began to use computers at
home and at work
The IBM PC 5150

7.

How Computers Changed Our Lives
• People use computers for work and
school
• Computers help us communicate
• They help in medicine and science
• They store and share information
• They are part of daily life
Students working in a computer lab

8.

Conclusion
• The computer was not invented by
one person
• It was a long process
• Many people and inventions
helped
• Computers changed the world
• They will continue to change our
future
An Apple II computer (1977)