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.


Comments

Post a Comment

please do not enter any spam link in the comment box

Popular posts from this blog

Foot in human body

Image
                FOOT FOOT • SOLE OF THE FOOT • THICK AND HAIRLESS. • IT IS FIRMLY BOUND DOWN TO THE UNDERLYING DEEP FASCIA BY NUMEROUS FIBROUS BANDS. • THE SKIN SHOWS A FEW FLEXURE CREASES AT THE SITES OF SKIN MOVEMENT. • SWEAT GLANDS ARE PRESENT IN LARGE NUMBERS. FOOT • SENSORY NERVE SUPPLY: • MEDIAL CALCANEAL BRANCH OF THE TIBIAL NERVE - WHICH INNERVATES THE MEDIAL SIDE OF THE HEEL; • BRANCHES FROM THE MEDIAL PLANTAR NERVE- WHICH INNERVATE THE MEDIAL TWO THIRDS OF THE SOLE • BRANCHES FROM THE LATERAL PLANTAR NERVE - INNERVATE THE LATERAL THIRD OF THE SOLE FOOT • DEEP FASCIA • THE PLANTAR APONEUROSIS IS A TRIANGULAR THICKENING OF THE DEEP FASCIA THAT PROTECTS THE UNDERLYING NERVES, BLOOD VESSELS, AND MUSCLES. • ITS APEX IS ATTACHED TO THE MEDIAL AND LATERAL TUBERCLES OF THE CALCANEUM. • THE BASE OF THE APONEUROSIS DIVIDES INTO FIVE SLIPS THAT PASS INTO THE TOES. MUSCLESOF THE FOOT ...
Read more

BRACHIAL PLEXUS

Image
BRACHIAL PLEXUS BRACHIAL PLEXUS u the nerve fibers derived from different segments of the spinal cord to be arranged and distributed efficiently in different nerve trunks to the various parts of the upper limb. u The brachial plexus is formed in the posterior triangle of the neck by the union of the anterior rami of the 5th, 6th, 7th, and 8th cervical and the 1st thoracic spinal nerve. COMPONENTS u Roots – C5 – T1 u Trunks – Upper – C5 and C6, Middle – C7, Lower – C8 and T1 u Divisions – Anterior and Posterior u Cords –in relation to the AXILLARY ARTERY u – Lateral Cord - anterior divisions of the upper and middle trunk u - Medial Cord - the anterior division of the lower trunk u - Posterior Cord - the posterior divisions of all three trunks u Branches CORD u lie above and lateral to the first part of the axillary artery u MEDIAL CORD - crosses behind the artery to reach the medial       side of the second part ...
Read more

PRIZE

Image
                                                 PRIZE Prize – Field 1.       Oscar – Film 2.       Dada Sahib Phalke – Film 3.       Grammy – Music 4.       Pulitzer – Journalism and Literature 5.       Arjuna – sports 6.       Bowelay – Agriculture 7.       Kalinga – Science 8.       Dhanwantri – Medical Science 9.       Bhatnagar – Science 10.   Nobel Prize – Peace, Literature, economics, Physics, Chemistry, Medical Science, 11.   Abel – Mathematics 12.   Merlin – Magic 13.   Bharat Ratna – Art, Science, Public Service, Sports 14.   Vyas Samman – Hindi Literature...
Read more