Peripheral devices are used to communicate with the “outside world” or hold information over the long period. Peripheral devices may fall into 3 basic classes:
i) Input Devices: Mouse, Keyboard, trackball, Joystick, Scanner, digital camera etc.
ii) Output Devices: Display screen (Monitor), Printer and Speaker etc.
iii) Mass storage Devices: Floppy disk, Pen Drive, Hard disk, CD-ROMs etc.
Printers:
There are two broad categories of Printers i.e., Impact & Non impact printers.
- Impact printer uses striking action to press carbons against a paper to create a character. Dot Matrix printer and Inkjet printer are some examples of impact printer. The term DOT matrix refers to the process of placing dots to form an image. The quality of the image is determined by the dots per inch. Inkjet printer forms text and/or images by spraying streams of quick-drying ink on paper. The ink is stored in disposable ink cartridges; often a separate cartridge is used for each of the major colors. These colors are usually Black, Red/Magenta, Green/Cyan, and Yellow (CYMK). Today, dot matrix printers are not commonly used or found because of the low quality print outs, when compared to ink jet printers or other later printer, technologies.
- A Non impact printer such as laser printer uses a laser technology to print images on the paper. Laser printers are often used in corporate, school, and other environments that require print jobs to be completed quickly and in large quantities.
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