what is Printer/defination


what is Printer/ define

     



 After a document is created on the computer, it can be sent to a printer for a hard copy (printout). Same printers offers special features such as coloured and large page formats. Some of the most commonly used printers are:

1.      Laser Printer

2.       Dot Printer

3.      Ink Jet Printer

4.      Line Printer

Laser Printer:

A laser printer produces high quality print that one normally finds in publishing. It is extremely fast and quiet. Moreover, the operation of a laser printer is extremely easy with automatic paper loading and no smudging or messing up of ink ribbons. Most laser printers output 6 to 12 pages per minute. Minimum buffer memory in a laser printer is 1 MB.

Dot Matrix Printer:

The dot matrix printer (DMP, in short) is a very versatile and inexpensive output device and is suitable for most of our computing jobs. In a DMP the print head physically “hits” the paper through the ribbon and produces text (or image) by combinations of dots; hence the name dot matrix printer. Its speed is measures in characters per second (CPS). Although DMP is less expensive, but it is louder, slower and produces lower print quality than a laser printer.

Ink Jet Printer:


An ink jet printer creates an image directly on Paper by spraying ink through as many as 64 tiny nozzles. Although the image it produces is not generally quit as sharp as the output of a laser printer, the quality of ink jet printer is till high
In general, ink jet printer offers an excellent middle ground between dot matrix and laser printer, providing print resolution of around 360 or more dots per inch. Like laser printer an ink jet printer is quiet and convenient, but not particularly fast. Typically, an ink jet printers is more expansive than a dot matrix printer, but costs only half as much as a laser printer.

Line Printer:


A line printer is generally used with large computer systems to produces text based data processing reports. Line printers are high-speed printers with speeds ranging anywhere from 100 to about 3800 lines per minute. In the past, print quality on line printers was not high. Developments in technology are improving the print quality on line printers. These are in the cost range of lacks.


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