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.The Four Functions.

.The Four Functions. Alex Mallory. INput. An input device is any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact with it, much like a TV .

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.The Four Functions.

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  1. .The Four Functions. Alex Mallory

  2. INput • An input device is any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact with it, much like a TV. • An input device is any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact with it, much like a TV. In the picture to the right, is a Logitech trackball mouse and an example of an input device. Below is a complete listing of all the different computer input devices that can be used on a computer.

  3. Continue of input • Examples: • Barcode reader • Digital camera • Gamepad • Joystick • Keyboard • Microphone • MIDI keyboard • Mouse (pointing device) • Remote • Scanner • Webcam

  4. Processing • “Using a computer to create, edit, and print documents. Of all computer applications, word processing is the most common. To perform word processing, you need a computer, a special program called a word processor, and a printer. A word processor enables you to create a document, store it electronically on a disk, display it on a screen, modify it by entering commands and characters from the keyboard, and print it on a printer.”

  5. Continue of processing • “The great advantage of word processing over using a typewriter is that you can make changes without retyping the entire document. If you make a typing mistake, you simply back up the cursor and correct your mistake. If you want to delete a paragraph, you simply remove it, without leaving a trace. It is equally easy to insert a word, sentence, or paragraph in the middle of a document.”

  6. Storage • storage device is a hardware device that stores information. There are two storage devices used in computers: a primary storage device such as computer RAM and a secondary storage device such as a computer hard disk drive.

  7. Continue Storage • When you think about your home computer, and all the information you store on it, that would be computer storage. • At home you would store your tax documents and any word documents.

  8. Output • “Any device that outputs information from a computer is called, not surprisingly, an output device. Since most information from a computer is output in either a visual or auditory format, the most common output devices are the monitor and speakers. These two devices provide instant feedback to the user's input, such as displaying characters as they are typed or playing a song selected from a playlist.”

  9. Continue output • monitors and speakers are most common output devices, there are many others. Some examples include headphones, printers, projectors, lighting control systems, audio recording devices.

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