INPUT AND OUTPUT DEVICES OF COMPUTER
Input and Output devices are a major part of the computer. They are a type of hardware device that makes up the computer system. These allow the system to function properly with external help. They both deal with data but in different ways.
The input allows the user to send data while the output completes the task related to the data. These all are auxiliary devices that connect to the device and complete all the tasks accordingly. Keyboards, mouse, scanners, etc are some of the input devices while printers, monitors, headphones, etc are some of the output devices.
Another important element of a hardware system is computer memory. It is where all the data goes either temporarily or permanently. It is mainly of two types – volatile memory and nonvolatile memory. Volatile memory needs the power to function and store information like static RAM or dynamic RAM.
Dynamic one is complicated to handle in terms of interface and thus requires regular refresh cycles. Meanwhile, SRAM has a better interface but requires six transistors per bit. Non Volatile Memory doesn’t require power to retain information and some of the examples are – ROM, Flash memory, Optical Disks, etc.
Input output Devices Example in Computer
Input Devices of Computer
As mentioned above the input devices allow the users to send signals to the computer to perform a certain task. The receiver at this end is the Central Processing Unit (CPU) which then sends the signal to the output devices. Input devices further classify according to modality like visual or audio, discrete or continuous, and is it direct or indirect.
Some of the classifications are –
1. Keyboard Devices
Keyer
Keyboard
Lighted Program Function Keyboard (LPFK)
2. Pointing Devices
A mouse sitting on a desk.
A computer mouse
3D mice
Joysticks
Pointing sticks
3. Composite Devices
Wii Remote
Wii Remote with attached strap
4. Game controller
Gamepad (or joypad)
Paddle (game controller)
Jog dial/shuttle (or knob)
Wii Remote
5. Visual Devices
Digital camera
Digital camcorder
Portable media player
Webcam
Microsoft Kinect Sensor
Image scanner
Fingerprint scanner
Barcode reader
3D scanner
Laser rangefinder
Eye gaze tracker
Medical Imaging
Computed tomography
Magnetic resonance imaging
Positron emission tomography
Medical ultrasonography
6. Audio Input Devices
Microphones
MIDI keyboard or another digital musical instrument
Some of the important input devices are −
1. Keyboard
The most basic input device to enter data on the system or any other device with the help of the keys is a keyboard. They establish a connection with the computer either by wifi or by a USB system. There are keys for everything – numbers, letters, characters, and functions.
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