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◦ Laser Printer
Laser printer prints the contents by laser technology. It is fast in operation
as it operates in similar manner as photocopy machines. The laser beam
makes shadow of the images with the help of toner and transfers them
on paper.
It is also known as ‘Page Printer’ because it actually stores the content of the page in
memory before printing it. It can print up to 5 to 300 pages in a minute and the resolution
output ranges from 600 dpi to 2400 dpi.
◦ Plotters
Plotter is an output device that helps in printing high quality poster, flex, visuals, charts,
graphs, tables and diagrams, etc. It can draw continuous lines and can produce output on
paper, polyester film or coloured transparencies. In plotter, the figures are drawn by an
electronic pen which is driven by a motor. It uses inkjet cartridges (single or multicoloured)
to spray colours for drawing and sketching.
There are mainly two types of plotters: Drum Plotter and Flatbed Plotter.
• Speakers: Speaker is an output device that converts the electrical
signals into sound waves that we hear. In speakers, electric current of
the music files is supplied to the magnet that pushes the diaphragm of
the speaker back and forth. This creates pressure and vibration in the
air and as a result sound is produced.
• Projector: A projector is an output device used to project the output from
a computer screen onto a large screen. It takes the input from a computer
in the form of an image and displays it on a wide screen. In schools’ smart
classes, office meetings, and cinemas, projectors are used for teaching
students, giving presentations in front of office employees, and projecting movies, respectively.
Storage Devices
Storage devices are used to store data on a computer. There are a number of storage devices
such as the hard disks, CDs, DVDs, Blu-Ray, and Flash Drive.
• Hard Disk: The hard disk is the most widely used internal storage
magnetic disk. It is made up of spindles of smooth metallic plates coated
with thin layer of magnetic material. Each plate of a hard disk is called a
platter. Each platter has two (read/write) heads, one on each side.
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iPlus (Ver. 2.0)-VII

