Computer Input And Output Devices Information Pdf

computer input and output devices information pdf

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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.

To interact with a computer, you need an intermediary, something that receives data you input and translates it for your computer.

An input device is essentially a piece of hardware component used to provide data and control signals to an information processing system such as computer or information device. Common inputs devices on modern computers include keyboards, mouse and touch screen which are used to enter commands and data directly. Other examples of input devices include scanners, digital cameras, joysticks and microphones. An output device is any hardware component that use received data from a computer to perform a task. The data received by the output device can be text, graphic, tactile, audio or video.

Input and Output

To interact with a computer, you need an intermediary, something that receives data you input and translates it for your computer. This intermediary is an input device. Input devices for communication are those that let you send sounds, thoughts, images or files to others via the computer. For business, input devices let you reach out to customers, colleagues and vendors. Businesses sometimes have hard copies of documents or images at one location that someone at another location needs to see.

Scanners can translate a hard copy into a digital file, which allows a connected computer to receive it. The file can then be uploaded or emailed to remote locations. Several kinds of scanners exist, including flatbed scanners, sheet-fed scanners and hand-held scanners. Microphones allow people to input audio material into computers. Often the audio is voice, and the microphones allow you to chat over the web. This technology allows far-flung participants to conduct business meetings, interviews and webinars -- seminars conducted via the web.

Often microphones are part of a headset, letting users keep their hands free for typing or writing. Microphones can also be used to communicate with the computer itself through a voice or speech recognition program. Users can command the computer or dictate documents. Webcams, too, allow businesses to hold meetings with far-off people. Telecommuters -- those working away from the actual business premises -- might also make use of webcam input.

Webcams translate live images for the computer so they can be sent via the Internet to another location in real time. The procedure is called videoconferencing.

Some computers have webcams built in. A microphone is necessary for the audio input. Businesses wishing to get messages out by featuring video on a website or YouTube need first to input the video into a computer.

A video capture device or digitizer does this, acting as a go-between for a video camera or television and a computer. Once in the computer, video can be formatted and shared on the Internet or turned into multimedia presentations. Some cameras connect directly to computers and can be considered input devices on their own.

The most-used computer input device is the keyboard. It allows users to communicate with the computer and its software, create documents that can be shared with others and compose emails. Ergonomic keyboards can minimize repetitive stress injury to hands and wrists.

These keyboards have wrist rests and keys laid out at an angle; both measures are designed to keep wrists in an optimum position.

An interactive white board allows users to communicate information to groups of people. It serves as both a display and an input device, connecting to a computer wirelessly or with cables so a group can see what's happening on the computer screen.

The contents of the computer screen are digitally projected onto the white board. The presenter uses fingers, a pen or another device to interact with the white board, which controls the computer and, thereby, the images that are presented. Sophie Johnson is a freelance writer and editor of both print and film media. A freelancer for more than 20 years, Johnson has had the opportunity to cover topics ranging from construction to music to celebrity interviews. By Sophie Johnson.

Scanner Businesses sometimes have hard copies of documents or images at one location that someone at another location needs to see.

Microphone Microphones allow people to input audio material into computers. Webcam Webcams, too, allow businesses to hold meetings with far-off people. Video Capture Device or Digitizer Businesses wishing to get messages out by featuring video on a website or YouTube need first to input the video into a computer. Keyboard The most-used computer input device is the keyboard. Interactive White Board An interactive white board allows users to communicate information to groups of people.

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Computer input and output devices

Choose the correct option and mark your choice against the corresponding question number in the given answer sheet by darkening the corresponding circle with a lead pencil. Now they are also used with nonportable desktop computer systems because they occupy less table space. Non-impact printers. Can print many special characters, different sizes of print, and graphics such as charts and graphs Are non-impact printers Most laser printers are monochrome, but color laser printers are also available Low speed laser printers can print 4 to 12 pages per minute. Produce audio output by selecting an appropriate audio output from a set of pre-recorded audio responses Applications include audio help for guiding how to operate a system, automatic answering machines, video games, etc.

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. It presents output visually on computer screen. The output appears temporarily on the screen and can easily altered or erased, it is sometimes referred to as soft copy also. The display device for a desktop PC is called monitor.

A list of input and output devices can only be incomplete, because there are simply so many specialized devices out there. The way in which we use the printer to extract prints from in different colours. Digitizer can convert a signal from the television or camera into a series of numbers that could be stored in a computer. Keyboard and mouse are the most commonly used input devices. What is the difference between data and information? T, hese devices are a vital part of the computer to process throughout the functions of the computer. Both Input and output devices require some form of control.

Chapter 9: Input-Output Devices

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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.

Input and Output Devices

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Computer components

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3 COMMENTS

Redlove76

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world. Input/Output devices are required for users to communicate with the computer. In simple terms, input devices bring information INTO the computer and output for manual input of characters and displays the information as it is keyed in.

Ken B.

REPLY

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Kelsey H.

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Input devices are used to enter data from the outside world into primary the computer. § Examples are output produced by printers or plotters on paper.

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