POWERPOINT PRESENTATION

Topics: Computer, Personal computer, Slide rule Pages: 20 (1410 words) Published: April 14, 2015
Introduction To
Computer
CREATED BY:
GINALYN A. NOYNAY
FMGT 1A
PROF. EFREN VICTORIA

What Is a Computer?
A Computer is an electronic
device , operating under the contol of
instructions stored in its own memory
that can accept data, process the data
according to specefied rules, produce
results, and store results for future
use.

How does a Computer work ?
INPUT

PROCESS

OUTPUT

Input – it is the raw information entered into a computer
from the input devices. It is the collection of letters,
numbers, images etc.

Process – is the operation of data as per given instruction It is totally internal process of the computer system.

Output – it is the processed data given by computer afte
data processing. Output is also called RESULT. We can
save these results in the storage devices for the future use Storage – computers can save data so that it can be used
At another time.

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History of Computer
ABACUS
Also called a counting frame, is
a calculating tool used primarily in
Parts of Asia for performing arithmetic
processes. The Abacus is really just a
representation of the human fingers:
the 5 lower rings on each rod
represent the 5 fingers and the 2
upper rings represent the 2 hands.

Napier’s Bones
Napier’s bone was invented by
John Napier (1550-1617), a Scottish
mathematician and scientist. Napier’s
bone was multiplication tables written
on strips of wood or bones. The
invention was used for multiplying,
dividing, and taking square roots and
cube roots.

Slide Rule
William Oughtred made the first
slide rule by inscribing logarithms
on wood or ivory. Before the
invention of the pocket or handheld
calculator, the slide rule was a
popular tool for calculations. The
use of slide rules continued until
about 1974, after which electronic
calculators became popular.

Pascaline ( First Mechanical calculator)
Invented by the French Mathematician
named Blaise Pascal (1642) first called
Arithmetic Machine, Pascal’s Calculator and
later Pascaline. It can add and subtract long
columns of numbers without making a
mistake.

Leibnitz Calculaor

Invented by Gottfried Wilhelm Leibnitz
a German Mathematician (1805), this
Machine can add, subtract, multiply, and
divide numbers and it could also find the
square roots of numbers.

Jaquard Weaving Loom

Another Frenchman named
Joseph-Marie
Jacquard
invented
a
weaving
loom
(1805).
It
follows
instruction from the Punch cards that
are fed to the loom to create patterns
onn cloth.and Analytical Engine
Difference
Charles Babbage designed “Difference Engine”
in 1822.
An english Mathematician named
Charles Babbage invented this machine
(1883). To build the analytical engine,
thousands of tiny parts had to be made
perfectly.

At that time , no machine could create parts
so small and exact. Because of that ,
analytical
engine was never built. But
because of Charles Babbage idea, he
became known as “Father of the Modern
Computer”.
A decade later, Lady Augusta Ada Byron
presented the idea that Punch cards could
be used to instruct Babbage’s engine to
perform certain repetitive instructions. So
because of this, she was popularly known as
the “First Programmer”.

Hollerith’s Punch Cards
The government created a
contest to find the best solution to
the problem. In 1890 it was won by
a census agent named William
Hollerith. In his...
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