HARDWARE
The components or devices that are connected to a computer
are collectively known as
hardware. For
example, monitor, mouse, keyboard, speakers, and printer come under the term
hardware.
INPUT - OUTPUT DEVICES.
As you know, a computer follows the I-P-O cycle for
processing . Therefore all the devices can be categorized as input and output
devices, and processing devices.
The input devices are used to give instructions to the
computer. For example ,keyboard and
mouse.
The output devices are used to display output of an
operation. For example , monitor and printer.
KEYBOARD
The keyboard provides different keys to perform various
operations, such as the cap lock, backspace , num lock, home, end.
 |
| KEYBOARD |
.
http://m.microsoft.com/showcase/en/us/details/42425036-49dc-4c26-8fed-1e5d2946bdaa
MOUSE
A mouse is a small device that is connected to the system
until by means of long wire. This is another input device, whose movement
causes the corresponding movements of a pointer on the screen. it usually has
two or three buttons using which the user can select options from the screen.
 |
| MOUSE |
VDU
Now that you are familiar with some input devices of the
computer , let us take a closer looks at an output device. Data that has been
processed needs to be displayed to the user. This is done using the monitor or
the VDU . The VDU is similar to a Tv screen and can display both text and
graphic images. The display can be either in black or white color.
 |
| VDU |
PRINTER
The output on the VDU cannot be stored for later reference .
For a permanent output, you would requires a printer that is also a common output
device Using the printer , you can obtain output on paper. Printers are capable of printing at
very high speeds.
 |
| PRINTER |
MICROPHONE
A microphone is an input devices that allows a user to speak
to the computer to enter data and instructions into the computer or it is used to record sound.
 |
| MICROPHONES |
.
JOYSTICK
A joystick is a pointing device with a vertical lever
mounted on a base. it is mainly used for computer games and ultrasound scanners
in hospitals.
 |
| JOYSTICK |
SCANNER
A scanner is a input device used to capture information, such
as, photographs and documents on paper
and translate the information into a raster (bitmap)
computer image.
 |
| SCANNER |
SPEAKERS
You can use speakers on a multimedia machine to listen to
the sound files, which can be audio, recorded by a microphone or audio CDS.
 |
| SPEAKERS |
No comments:
Post a Comment