History of Computer

of
Computer Teacher
JUAN M. ALBERTO MEMORIAL ELEMENTARY SCHOOL
(JMAMES)
Lanao, Virac, Catanduanes

2history.ppt 21-Jan-03
People in early times
used their fingers and made
marks on cave walls to help
themselves remember and
count. They used STICKS and
STONES to keep track of
things.

A counting machine called “ABACUS” , was used by
people in China, Greece, and Middle East to calculate.
Beads were moved back and forth along parallel rods to
add and subtract large numbers. Chinese call it the
“suan pan”, while the Japanese call it “soroban”.

- Scottish landowner known
as a mathematician,
physicist, astronomer and
astrologer.
- invented Napier’s Bones.
1550 - 1617

Napiers Invention was used to multiply and
divide numbers. It was the first machine to use the
decimal point.

used to multiply divide numbers

- English Mathematician
(was one of the world's
great mathematicians)
- invented the slide rule
- introduced the "×" symbol
for multiplication as well as
the abbreviations "sin" and
"cos" for the sine and cosine
functions.
1574 - 1660

Slide rule was
similar to a calculator
and could accurately
add numbers up to
three digits.

- French Mathematician ,
physicist, inventor, writer
and catholic philosopher.
- invented the pascaline
1623 - 1662

Pascal developed a calculator called the "Arithmatique"
or "Pascaline." Pascal's device used a series of toothed wheels,
which were turned by hand and which could handle numbers up
to 999,999.999. Pascal's device was also called the "numerical
wheel calculator" and was one of the world's first mechanical
adding machines.

- German mathematician and
philosopher
- improved Pascal’s invention
- invented the First Calculator
called the Step Reckoner (or
Stepped Reckoner) was a
digital mechanical calculator or
called now the Leibnetz wheel
1646-1716

Step Reckoner or Leibnitz wheel was a digital
mechanical calculator around 1672 and completed in 1694. The
name comes from the translation of the German term for its
operating mechanism; staffelwalze meaning 'stepped drum'. It
was the first calculator that could perform addition, subtraction,
multiplication and division.

- French silk weaver and
inventor,
- improved on the original
punched card design of
Jacques de Vaucanson's loom
of 1745
- Invented Automatic Loom or
the Jacquard Loom
1752 - 1834

Automatic loom or Jacquard
Loom controlled by punched cards.
The cards controlled the selection
of threads to create a variety of
patterns.

• English inventor
• taught math at Cambridge
University
• invented a viable
mechanical computer
equivalent to modern
digital computers called
the difference and
analytical engine
• Called the Father of
modern computer
1791-1871

- Babbage first computer
- a mechanical device that
could perform simple
mathematical calculations.
- automatic, mechanical
calculator designed to
tabulate polynomial
functions.

- Babbage ‘s second
computer
- used binary system
- punched cards as input
- Ada Lovelace (first
programmer) close
friend of Charles
Babbage
- intended to combine its
numerical qualities as
though they were
letters or other
symbols.

• Countess of Lovelace (more
commonly known as Ada
Lovelace) was a mathematics
prodigy of sorts and a brilliant
woman far ahead of her time in
terms of ideas
• ‘The Enchantress of Numbers’.
• World’s first Programmer
1815-1852

• was an American
statistician
• a mechanical tabulator
based on punched card to
rapidly tabulate statistics
from millions of pieces of
data.
• He was the founder of one
of the companies that later
merged and became IBM.
1860 –1929

- used to count the
number of people who
lived in the US
for more that 50 years.
- used punched card as
an input

• an electrical engineer and physicist
• the original conceptual designer behind
IBM’s Harvard Mark I Computer.
1900 – 1973
• American computer scientist and US
Navy Officer.
• she was one of the first programmers of
the Harvard Mark I computer and deve-
loped the first compiler for a computer
programming language
• she is sometimes referred to as
"Amazing Grace."

- described as "the
beginning of the era of
the modern computer"
and weighed 10,000
pounds.

• both involved in science and wondered if there was a
faster way to calculate equations
1900 – 1973
JOHN MAUCHLY JOHN PRESPER ECKERT JR.

- World’s first
digital computer
- Massive machine
was world’s first
large-scale
electronic general-
purpose digital
computer
- Filled entire room
& calculate in two
hours

- was the first
commercial
computer
produced in the
United States

- Made up of silicon
chips.
- Silicon chips are
made up of silicon,
an element found
in sand.
- Allows a computer
to operate faster

- IBM introduced
the 1st
personal
computer
- The smallest type
of computer
designed for a
single user

- Computers
getting smaller
and more
powerful.
- Computers that
are so tiny to fit
in your hand

- Computers
programmed to
create realistic three-
dimensional worlds.
- Using headsets, pilots
and surgeons use VR
to do complex jobs

History of Computer

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