Definition: an input device is any peripheral device that is used to give commands and input data into the computer system for processing and ouputing of results.
TYPES OF INPUT DEVICES
the types of input devices are listed below:
- keyboard
- Biometrics (finger print scanner)
- Barcode reader
- Card reader
- Game pad
- Joysticks
- Paddle
- Gesture recognition
- Graphics tablet
- Light pen
- Light gun
- Magnetic strip reader
- Magnetic card reader
- Magnetic character reader MICR
- Optical mark reader OMR
- Remote
- Touch screen
- Touch pad
- Mouse
- Scanner
- Microphone
- Joystick
- Card reader
- Light pen
Digital cameras etc.
KEYBOARD:The keyboard is a panel of keys used as an input device to enter text, characters etc and to give commands into the computer system .
A standard desktop keyboard has 101 keys which includes alphabetical characters, punctuations, symbols, numbers and function keys.
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Functions of the keyboard
- To input data into the computer
- To input commands and instructions into the computer system.
- It provides quick access to menu's
- It can be used to navigate through pages
It is basically used for typing and editing of texts and graphicsgraphics
FUNCTION KEYS
A function keys are keys on the keyboard which can be programmed to make application programs or operaetc
g system to command the interpreter to perform certain functions. e.g key f1,f2,f3,...f12.
NUMERICAL KEY'S
These are located on the right side of the keyboard. it contains 0-9 keys. It is only active when Num lock is On.
ALTERNATIVE KEYS
These Keys are used to alternate the keyboard functions. Example Alt keys, shift keys, num lock etc.
ALPHABETICAL KEYS
These keys contains alphabet. They are 26 in number. Example A-Z
Arrows keys
Control keys
Navigation keys etc
THE MOUSE
is is basically used to perform windows task operations. The types are
1.optical
2.mechanical
3.laser
Uses of the mouse
- Pointing
- Clicking
- Double clicking
- Right clicking
Dragging etc
Why does a computer need an input device?
Today, input devices are important because
they are what allows you to interact with and
add new information to a computer. For
example, if a computer had no input devices,
it could run by itself but there would be no
way to change its settings, fix errors, or other
various user interactions. Also, if you wanted
to add new information to the computer (e.g.,
text, command, document, picture, etc.), you
wouldn't be able to do so without an input device.
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