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is a general-purpose device that can be
programmed to carry out a set of arithmetic or
logical operations automatically. Since a
sequence of operations can be readily changed,
the computer can solve more than one kind of
problem.
Input
Process
Storage
Output
System Unit
A typical desktop computer consists of a
computer system unit a keyboard, a mouse,
and a monitor.
Monitor
is an electronic visual display for computers.
The monitor comprises the display device,
circuitry and an enclosure.
System unit
A typical desktop computer
consists of a computer
system unit, a keyboard, a
mouse, and a monitor.
Monitor
a display is an electronic
visual display for computers
The monitor comprises the
display device, circuitry and
an enclosure.
Keyboard
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is a typewriter-style device,
which uses an arrangement
of buttons or keys, to act as
mechanical levers or
electronic switches.
Following the decline of
punch cards and paper tape,
interaction via teleprinterstyle keyboards became the
main input device for
computers.
Mouse
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is a pointing device that
detects two-dimensional
motion relative to a surface.
The one that control the
movement of the cursor.
Optical Mouse
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An optical mouse uses
camera technology and
digital processing to compare
and track the position of the
mouse, rather than a ball and
rollers used on older devices
Mechanical Device
is a computer mouse that
contains a metal or rubber ball
on its under side. When the ball
is rolled in any direction,
sensors inside the mouse detect
this motion and move the onscreen mouse pointer in the
same direction.
Automatic Voltage
Regulator ( AVR )
is a device designed to regulate
voltage
automatically – that is, to take a
fluctuating voltage level and it
converts AC to DC.
is a peripheral (piece of computer hardware
equipment) used to provide data and control
signals to an information processing system
such as a computer or other information
appliance.
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is any piece of computer hardware equipment
used to communicate the results of data
processing carried out by an information
processing system (such as a computer) which
converts the electronically generated
information into human-readable form.
Hardware
is the collection of physical elements that constitutes a
computer system. Computer hardware is the physical parts or
components of a computer, such as the monitor, mouse, keyboard,
computer data storage, hard disk drive (HDD), system unit
(graphic cards, sound cards, memory, motherboard and chips),
and so on, all of which are physical objects that can be touched
(that is, they are tangible).
Software
is any set of machine-readable instructions that directs a
computer’s processor to perform specific operations. Computer
software contrasts with computer hardware, which is the physical
component of computers.
meaning application software only. Software is stored in computer
memory and is intangible, i.e. it cannot be touched.
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Children especially who are not using the computers in the right
manner are at the most risk. There are several negative effect on
children .
Children spend much time in playing games or social networking
rather than their education and learning.
Children are becoming lazy and have lost the habit of manually
referring to books or dictionary.
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They like to spend much time on the computer rather than playing
outdoor games.
Can get diseases on the computer.
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It reduces human laborious effort.
It provides us with extreme convenience in
accessing and processing information, which
was previously impossible.
Computer have made life easier and more
convenient.
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Computers can help businesses by making their staff efficient and
productive and also save their valuable time in any business or
office.
There is a need for more computers in everyday life, in homes,
schools and on the job.
Computer helping students get better grades in school, from help
with homework over the internet to doing research for an essay at
the local library.
Computers are now being used to help the blind with a voice
synthesizer that tells them what they are typing or what they are
trying to see on the screen.
Computers in law enforcement, today computers are being used
in law enforcement to check records of people who are arrested
for all types of crime, and to make sure that they are who they say
they are.