What is Computer?????
And what is Computer History????
Meaning Of computer.........
an electronic device which is capable of
receiving information (data) in a particular form
and of performing a sequence of operations in
accordance with a predetermined but variable
set of procedural instructions (program) to
produce a result in the form of information or
signals.
History Of computer.........
The computer as we know it today had its beginning
with a 19th century English mathematics professor
name Charles Babbage.
He designed the Analytical Engine and it was this
design that the basic framework of the computers
of today are based on.
Generally speaking, computers can be classified
into three generations. Each generation lasted for a
certain period of
time,and each gave us either a new and improved
computer or an improvement to the existing
computer.
First generation: 1937 – 1946 - In 1937 the first
electronic digital computer was built by Dr. John V.
Atanasoff and Clifford Berry. It was called the
Atanasoff-Berry Computer (ABC). In 1943 an
electronic computer name the Colossus was built
for the military. Other developments continued until
in 1946 the first general– purpose digital computer,
the Electronic Numerical Integrator and Computer
(ENIAC) was built. It is said that this computer
weighed 30 tons, and had 18,000 vacuum tubes
which was used for processing. When this
computer was turned on for the first time lights dim
in sections of Philadelphia. Computers of this
generation could only perform single task, and they
had no operating system.
Second generation: 1947 – 1962 - This generation
of computers used transistors instead of vacuum
tubes which were more reliable. In 1951 the first
computer for commercial use was introduced to the
public; the Universal Automatic Computer (UNIVAC
1). In 1953 the International Business Machine
(IBM) 650 and 700 series computers made their
mark in the computer world. During this generation
of computers over 100 computer programming
languages were developed, computers had memory
and operating systems. Storage media such as tape
and disk were in use also were printers for output.
Third generation: 1963 - present - The invention of
integrated circuit brought us the third generation of
computers. With this invention computers became
smaller, more powerful more reliable and they are
able to run many different programs at the same
time. In1980 Microsoft Disk Operating System (MS-
Dos) was born and in 1981 IBM introduced the
personal computer (PC) for home and office use.
Three years later Apple gave us the Macintosh
computer with its icon driven interface and the 90s
gave us Windows operating system.
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