Transcript History

History of Computers
Created by Mrs. Gile
Based on information taken from Computers Made Friendly
1642
19 year old Frenchman named Blaise Pascal invents a machine
that can add and subtract. He called the machinge the Pascaline.
1673
• A German by the
name of Gottfried
Leibniz invents the
Leibniz Calculator.
This machine could
add, subtract, multiply
and divide.
1823
• An Englishman;
Charles Babbage
designed the
Difference Engine and
the Analytical Engine.
Because of his
contributions,
Babbage is known as
the Father of
Computers.
1890
• Herman Hollerith
became the first
American to
contribute to the
invention of
comptuers. He
invented the
Tabulating Machine.
He began a company
called International
Business Machines.
1940
• Vacuum Tubes
controlled the flow of
electricity in a
computer. They got
very hot and would
burn out. When this
happened, the
computer stopped
working.
1950
• Transistors replaced
vacuum tubes.
Transistors were much
smaller, and were
more reliable than
vacuum tubes.
1960
• The first integrated
circuit was designed.
It combines all the
electronic parts a
computer needs to run
in one small place – a
chip. It is about the
size of your fingernail.
1974
• A microprocessor
contains not only
electronic circuits but
also memory storage
for a computer. Today
microprocessors are
small enough to fit
into machines that fit
in the palm of your
hand.