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Input And Output Unit Of Computer Pdf

input and output unit of computer pdf

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Published: 20.04.2021

What is the difference between an input and output device?

The terms and definitions in the study of computer system are: Hardware: The physical parts of a computer system called as hardware. Computer hardware refers to the physical parts or components of a computer such as the monitor, mouse, keyboard, computer data storage, hard drive disk HDD , system unit graphic cards, sound cards, memory, motherboard and chips , etc. Any part that we can see or touch is the hard ware. How about we go shopping for a new computer system for you? Hard Disk: the hard disk drive is inside the computer … Q.

Output Device can produce the final product of machine processing into a form usable by humans. It provides man to machine communication. Keyboard is most common input device is used today. The data and instructions are input by typing on the keyboard. The message typed on the keyboard reaches the memory unit of a computer. Apart from alphabet and numeral keys, it has other function keys for performing different functions. The mouse is rolled over the mouse pad, which in turn controls the movement of the cursor in the screen.

Output device

Inputs are the signals or data received by the system and outputs are the signals or data sent from it. For instance, a keyboard or computer mouse is an input device for a computer, while monitors and printers are output devices. Devices for communication between computers, such as modems and network cards , typically perform both input and output operations. The designation of a device as either input or output depends on perspective. Mice and keyboards take physical movements that the human user outputs and convert them into input signals that a computer can understand; the output from these devices is the computer's input. Similarly, printers and monitors take signals that computers output as input, and they convert these signals into a representation that human users can understand.

In this lesson students consider a number of computing devices to determine what types of inputs and outputs they use. Groups are assigned to a computing device and based on a teacher-provided definition of input and output, list the inputs and outputs of their device. Earlier in the activity students are prompted to focus on more obvious physical inputs and outputs e. Throughout the lesson the teacher records inputs and outputs that are identified on a T-Chart at the front of the room. To conclude the lesson students examine common activities they do on a computing device and select the inputs and outputs used for that activity from the chart. In the previous lesson students were introduced to the input, output, store, and process model of a computer. Since this model of a computer is still fairly abstract, this lesson grounds it in the ways a computer actually input and output information.

It handles all the input-output operations of the computer system. Input or output devices that are connected to computer are called peripheral devices. These devices are designed to read information into or out of the memory unit upon command from the CPU and are considered to be the part of computer system. These devices are also called peripherals. For example: Keyboards , display units and printers are common peripheral devices.


This is ideal for word processing and other volume data and program entry activities. This type of keyboard is available with most mainframe computer terminals or.


Lesson 5: Input and Output

Input and Output Devices

The devices are usually used for display, projection, or for physical reproduction.

Computer input and output devices

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An output device is any piece of computer hardware equipment which converts information into human read able form. It can be text , graphics , tactile , audio , and video. A new type of Output device is being developed these days, known as Speech synthesizer , [2] a mechanism attached to the computer which produces verbal output sounding almost like human speeches. A display device is the most common form of output device.

An input device sends information to a computer system for processing , and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device. Most devices are only input devices or output devices, as they can only accept data input from a user or output data generated by a computer. For example, as shown in the top half of the image, a keyboard sends electrical signals, which are received as input. Those signals are then interpreted by the computer and displayed, or output , on the monitor as text or images. In the lower half of the image, the computer sends, or outputs , data to a printer.


Computer Fundamentals: Pradeep K. Sinha & Priti Sinha. Slide 5/ Chapter 9: Input-Output Devices. Ref Page. Commonly Used Input Devices. § Keyboard.


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Such devices make up the peripheral equipment of modern digital computer systems. Peripherals are commonly divided into three kinds: input devices, output devices, and storage devices which partake of the characteristics of the first two. An input device converts incoming data and instructions into a pattern of electrical signals in binary code that are comprehensible to a digital computer. An output device reverses the process, translating the digitized signals into a form intelligible to the user. At one time punched-card and paper-tape readers were extensively used for inputting, but these have now been supplanted by more efficient devices. Input devices include typewriter-like keyboards; handheld devices such as the mouse , trackball, joystick, trackpad, and special pen with pressure-sensitive pad; microphones, webcams, and digital cameras. They also include sensors that provide information about their environment— temperature , pressure , and so forth—to a computer.

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3 Comments

  1. Isabel R.

    22.04.2021 at 03:03
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    Imperial guard 3rd edition codex pdf ramesh babu digital signal processing pdf free download

  2. Nugroho K.

    25.04.2021 at 13:05
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    Input/Output devices are required for users to communicate with the computer. for manual input of characters and displays the information as it is keyed in.

  3. Smithjunior B.

    29.04.2021 at 12:01
    Reply

    Identify the hardware devices typically used for audio output. Understanding Computers: Today and Tomorrow, 15th Edition. 3. Page 4.

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