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Difference between an input and output device?

There are many input devices such as a keyboard, mouse, webcam, microphone and more, which send information to a computer system for processing. An output device, like Monitor, printer and more, displays the result of processing generated by input devices. Input devices only work for giving input of data to the system, and output devices accept the output after processing of data from other devices.

Difference between an input and output device

One of the main differences between input and output devices is that input devices are ones that are used to give input to the system by the users, whereas output devices are those, which are used to reproduce the output signals for the user.

There are various devices that are used to accept input of data from user or output data generated by a computer; therefore, they are known as input devices or output devices. However, some devices are referred to as Input/output devices, as they can receive input and reproduce output.

For instance, as shown in the above image, a keyboard is an input device, sending an electrical signal to the computer system. A computer system accepts these signals as input, then translates them and produces or displays output to the user on the monitor as text or images. In the lower half of the image, it is also shown that after processing, the computer sends data or output to the printer. Then, once the computer sends output to the printer, it is printed onto the piece of paper that is also considered output.

Input devices

An input device can receive instructions from users or forward information to another device, but it is not able to accept data from another system. After receiving input, it translates these data into the electrical signals in binary code, which cannot be understandable by humans, and only a digital computer can understand it. There are many examples of input devices, which are discussed below:

  • Keyboard and Mouse: These are the input devices that are used by the users to give input to the computer. They send the received input (Data) from users to the system. As these are input devices, they cannot receive or display output (information) from the computer.
  • Microphone: Another input device is a microphone that accepts sound generated by an input source and allows users to send audio into their computers. In the microphone, the accepted signal may be converted into a digital signal or can be amplified as an analog signal.
  • Webcam: A webcam is a video camera that connects to a computer and faces the user, which is used to capture pictures, make a video by a computer system. It takes images as input from where it is pointed and used for calling and taking selfies. However, most modern webcams have a microphone, which offers users a better sound quality while making videos. Webcams are attached to the monitor of a desktop computer and also built into laptops.

Output devices

Output devices are the section of a computer device that receives data from another device and produces output with the information. Although it cannot send data to another device, it has the ability to forward data from a computer to another computer system. It functions to take data from input devices and translate the digitized signals into a form that can be understandable by users. There are various examples of output devices; some are discussed below:

  • Monitor: A monitor is a piece of computer hardware that accepts data from a computer (output) and displays it on the system screen through the computer's video card. Monitors have the ability to display information at a much higher resolution. Additionally, these are much like televisions and also known as video screen, display, video display terminal, or video display unit.
  • Speakers: The most common output devices, speakers accept sound data from a computer and play the sounds for users to hear. Although speakers can be used with any type of sound system, some speakers are manufactured only for computers. It is a device that cannot receive sound generated by users as well as refer that sound to another device. The main objective of the speakers is to produce sound or audio output for the listener.
  • Projector: A projector is an output device that accepts data from a computer (output) and projects that data or information as a picture onto a wall or screen or any large surface. It does not have the ability to receive data from a user and also not capable of sending that data to another device. When you are showing video or images to a large group of people, a projector is more beneficial to use instead of a monitor because it displays data on a large surface that can be visible to a large number of people clearly.

Input/output devices

An input/output device has the ability to accept data from users or another device (input), as well as forward data to another device (output). Some examples of input/output devices are discussed below:

  • CD-RW drive and DVD-RW drive: These drives functions for accepting data from a computer as an input to copy onto a writable CD or DVD. And, this data contained on a CD or DVD is sent by the drive to the computer.
  • USB flash drive: It is also referred to as a keychain drive, data stick, USB flash drive, thumb drive, memory unit, pen drive. It is a portable storage device that saves or accepts data from a computer (input). It connects to a computer via a USB port and forwards data to a computer or another device (output).

Difference between Input and Output devices.

The below table contains major key points of the difference between both Input and Output devices.

Input device Output device
The input device receives data from users. An output device displays data on the screen for users.
It works for translating user-friendly instructions into a machine friendly. It works for translating the machine's instructions to user intelligible.
An input device can be commanded by the user. Processor commands output device.
It accepts data from the user as an input and forwards it to the processor for further processing. The data, which is processed by the processor, is sent to the output device for sending it back to the user; it means that the output device takes the processed data from the processor.
Its design is more complex. As compared to input devices, its design is less complex.
Input device helps the computer to receive instructions from users. The output device helps the computer to produce or display the information to the users.
There are various input devices available like Microphone, Joystick, Keyboard, Pointing device, Image Scanner, Graphics tablet, and more. There are several output devices available such as Speakers, Printers, Plotters, Projector, Monitor and more.

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