SOFTCOPY OUTPUT...

A soft-copy output is an output,which is not produced on paper or some other meterial,which can not be touched and carried for being shown to otheers.They are temporary in nature,and vanish after use.A worksheet of any organization that can be viewed on maoniter screen would be called softcopy report....

HARDCOPY OUTPUT...

A hardcopy output is an output,which is produced on a paper or some meterial,which can be touched and carried for being shown to others..They are permanenet in nature,and can be kept in paper files,or can be looked later,when the person is not using the computer...

MONITERS...

Moniters are by far the most popular output device and used today for producing soft-copy output.They display the generated output on a television like screen.A moniter is usually associated with a keyboard ,and together they form a video display terminal (VDT).A VDT is the most popular (I/O) device used with today's computers.There are two types of moniters used now a days CRT and FLAT-PANEL....

PRINTERS..

Printers are the most commonaly used output devices today for producing hard copy outut.The various types of printers in use today..

DOT MATRIX PRINTERS...

Dot matrix printers are character printers,which print one character at a time.They form characters and all kinds of images as a pattern of dots.A dot matrix printer has a print head,which can move horizentlly across the paper.The print head contain an array of pins,which can be activated independent of each other to extend and strike against an inked ribon to form a pattern of dots on the paper.

Dot matrix printers are normally slow with speed usually ranging between 30 to 600 characters per second.However,they are cheap in term of both initial and cost op operation.

INKJET PRINTERS....

Inkjet printers are character printers,which form characters and all kind of image by spraying small drops of ink on the paper.The print head of an inkjet printer contains up to 64 tiny nozzels,which can be selectively heated up in a few microseconds by an integrated curcuit register.

Inkjet printers are slower than Dot matrix speed usually ranging between 40 to 300 character per second.Typically it is more expensive than dot matrix.

DRUM PRINTERS...

Drum printers are line printers,which print one line at a time.It consists of a solid cylindrical drum with characterd embossed on its surface in the form of circular bands.Each band consists of all the printing characters supported by the printer in its character set,and the total number of bands is equal to the maximum number of characters that can be printed on aline.Typical speeds of drum printers are in the range of 300 to 2000 lines per minute.

LASER PRINTER....

Laser printers are page printers,which print one page at a time.The main components of a laser printer are a laser beam source,a multi-sided mirror,a photoconductive drum and toner.

To print a page of output,the laser beam is focused on the electro staticaly charged drum by spining multi-sided mirror.

The most common laser printers have resolution of 600 dpi,some high quality laser printers have resolution of 1200 dpi.

Very high speed laser printer can print 500 to 1000 pages per minute.Because of their better quality print and speed they are more expensive..