These are popular output devices. The result of processed data is called output. There are two types of output. Hard output which is the result printed on paper and soft output which is the result available as visual and audio form. There are different devices used to provide result to the user. These are called output devices. Popular output devices are printer, monitor, and plotter etc.
Most popular and commonly used output device is monitor. It displays the character and graphic on screen. According to the technology used on the monitor, we have two types of monitor. CRT monitor: Common monitor that uses large vacuum tube called Cathode Ray Tube (CRT) and CRT monitor. It looks like a common TV screen. It is old type of monitor and big in size but cheaper in price.
It is one of the most common hard output devices. It is used to print the result on the paper. Basically printers are divided into parts:
Inkjet printers are non-impact printers which print text and images by spraying tiny droplets of liquid on the paper. They are the most popular printers for home use. Currently, most inkjet printers use either thermal inkjet. The inkjet head designs also divided into two main groups: fixed-head and disposable head.
Advantages of inkjet printers
Disadvantages of inkjet printers
laser printers are non-impact printers which can print text and images in high speed and high quality resolution. Unlike inkjet printers, laser printer use toner (Black or color powder) instead of liquid inks. A laser printer consists of these major components: drum cartridge, rotating mirror, toner cartridge and roller.
Advantages of laser printers
Disadvantages of laser printers
Dot-matrix printer is an impact printer that produces text and graphics when tiny wire pins on the print head strike the ink ribbon. The print head runs back and forth on the paper like a typewriter. When the ink ribbon presses on the paper, it creates dot that form text and images. Higher number of pins means that printer prints more dots per character, thus resulting in higher print quality. Dot-matrix printers were very popular and the most common type of printer for personal computer.
Advantages of dot matrix printer
Disadvantages of dot matrix printer
A popular output device that prints engineering drawing charts and graphics are plotters. It prints high quality drawing and graphics.
There are two types of plotters.
The full form of MoDem is Modulator Demodulator. It is an input as well as output device. It converts analog signals i.e. signals from wave and the cable to digital signal i.e. signal used by the computer to process data and vice-versa.
All the physical parts or tangible components of computer which can be touched and felt is known as computer hardware E.g. keyboard, monitor, RAM, hard disk etc.
|CRT monitor||LCD monitor|
|i. It is made by glass and heavier.||i. It is made by liquid crystal material and |
|ii. It is cheaper and not portable.||ii. It is expensive and portable.|
|iii. It produces low quality.||iii. It produces high quality output.|
|Impact printer||Non-Impact printer|
|i. It produces sound while printing.||i. It does not produce sound while printing.|
|ii. It is cheaper.||ii. It is expensive.|
|iii. It prints slowly.||iii. It prints fastly.|
|iv. E.g. Dot matrix||Iv . E.g. Laser|
Dot matrix printers are impact type character printers that print one character at a time. They form characters or all kinds of images as a pattern of dots by hitting an inked object i.e. Ribbon.
They are also impact type printer which use hammer like object to hit on inked object & form impression on paper. Every hammer of daisy wheel printer contains letter face and is arranged in wheel like form.
They are also impact type faster printer which prints an entire line at a time. These types of printer have a set of hammers in the front of the drum in a manner that an inked ribbon and paper can be placed between the hammers drum.
Laser printers are high speed not impact page printers that print one page at a time. They consists laser beam source, mirror, a photoconductive drum and toner. They follow the electrostatic principle while printing and produce very high quality output.
Ink jet printers are non-impact type of printer that form character or all kinds of images by spraying small drops of ink on a paper. These printers produce high quality output than impact printers.
Bubble Jet printers are the latest non-impact printers manufactured by Cannon Company an Hewlett Packard. These printers use thermal Bubble technology to print on the paper on which tiny registers create heat, and this heat vaporizes ink to create a bubble.
|Parallel port||Serial port|
|1. They are also known as ‘LPT' ports.||1. They are also known as ‘COM' ports.|
|2. The specification of parallel port is
|2. The specification of serial port is
|3. They are mainly used to connect printers
|3. They are mainly used to connect
modems, mouse etc.
Port name and their related devices are:
|Port name||Related devices|
|1. Serial port||Mouse|
|2. Parallel port||Printer|
|3. USB port||Pen drive, USB mouse, USB printer etc.|
|4. VGA port||Monitor|
|5. Game port||Joystick|
|6. Ethernet port||Network connector|
|7. Speaker port||Speaker|
|8. Keyboard port||Keyboard|
|9. Mouse port||Mouse|
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