Input Devices And Output Devices Of Computer Pdf

input devices and output devices of computer pdf

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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. It presents output visually on computer screen.

Input Devices for Business Communication

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.

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.

Input Devices

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.

Keyboard is the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions. These keys include the letter keys A-Z and digit keys 09 which generally give the same layout as that of typewriters. It is used to enter the numeric data or cursor movement. Generally, it consists of a set of 17 keys that are laid out in the same configuration used by most adding machines and calculators. The twelve function keys are present on the keyboard which are arranged in a row at the top of the keyboard. Each function key has a unique meaning and is used for some specific purpose.

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/Output devices are required for users to communicate with the computer. In simple terms, input devices bring information INTO the computer and output.


Chapter 9: Input-Output Devices

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.

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.

Computer components

Разница равна трем. Он медленно потянул к себе микрофон. В то же самое мгновение Сьюзан опять бросила взгляд на руку Танкадо, на этот раз посмотрев не на кольцо… не на гравировку на золоте, а на… его пальцы. Три пальца. Дело было вовсе не и кольце, a в человеческой плоти.

И опять за дверью что-то как будто включилось. Она услышала, что в кабине работает вентиляция. Лифт. Почему же не открывается дверца. Вглядевшись, она как в тумане увидела еще одну панель с буквами алфавита от А до Z и тут же вспомнила, что нужно ввести шифр.

Lesson 5: Input and Output

 Какой ключ. Стратмор снова вздохнул. - Тот, который тебе передал Танкадо.

Предмет, который она держала, был гораздо меньшего размера. Стратмор опустил глаза и тут же все понял. Время для него остановилось. Он услышал, как стучит его сердце. Человек, в течение многих лет одерживавший победу над опаснейшими противниками, в одно мгновение потерпел поражение.

 Ну и проблема! - засмеялся Хейл.  - Думаю, коммандер мне его откроет. Разве не так, коммандер. - Ни в коем случае! - отрезал Стратмор.

 Установлена аудиосвязь. Через пять секунд она станет двусторонней. - Кто это такие? - переминаясь с ноги на ногу, спросил Бринкерхофф. - Всевидящее око, - сказал Фонтейн, вглядываясь в лица людей, которых он отправил в Испанию.

 Всевидящее око, - сказал Фонтейн, вглядываясь в лица людей, которых он отправил в Испанию. Это была вынужденная мера. Фонтейн почти во всем полагался на Стратмора и верил в его план, в том числе и в достойную сожаления, но неизбежную необходимость устранять Энсея Танкадо и в переделку Цифровой крепости, - все это было правильно.

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