Introduction to Computer Skills, What is Computer, History of Computer.

1. Computer Skills
INSTRUCTOR: USMAN KHAN
LECTURER IN COMPUTER SCIENCE
GHAZALI INSTITUTE OF MEDICAL SCIENCES PESHAWAR
EMAIL: usmanrahii0@gmail.com
Mobile: 03339034099
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2. What is Computer?
 Computer is an electronic device that is designed to work with
Information. The term computer is derived from the Latin term ‘computare’,
this means to calculate or programmable machine. Computer can not do
anything without a Program. It represents the decimal numbers through a
string of binary digits. The Word 'Computer' usually refers to the Center
Processor Unit plus Internal memory.
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 Computer stands for “Common Operating Machine Particularly Used for
Trade, Education, and Research”

3. Continued….
 Charles Babbage is called the "Grand Father" of the computer. The First
mechanical computer designed by Charles Babbage was called Analytical
Engine. It uses read-only memory in the form of punch cards.
 Computer is an advanced electronic device that takes raw data as input from
the user and processes these data under the control of set of instructions
(called program) and gives the result (output) and saves output for the future
use. It can process both numerical and non-numerical (arithmetic and logical)
calculations.
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4. Continued….
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5. History of Computer:
 The first digital computer and what most people think of as a computer was
called the ENIAC(Electronic Numerical Integrator And Computer). It was built
during World War II (1943-1946) and was designed to help automate the
calculations being done by human computers. By doing these calculations on a
computer, they could achieve results much faster and with fewer errors.
 Early computers like the ENIAC used vacuum tubes and were large (sometimes
room size) and only found in businesses, universities, or governments. Later,
computers began utilizing transistors as well as smaller and cheaper parts that
allowed the ordinary person to own a computer.
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