Page 84 - TP_IT_V1.0_C9_flipbpookl
P. 84
Laser Printer
A laser printer works just like a photocopy machine that prints the output at high-speed
and good quality. It creates images using a laser beam and powdered ink called toner. It
is more expensive than inkjet printers and can be used for home or business purposes.
Laser Printer
Plotter
A plotter is an output device similar to a printer but used to print vector graphics
like architectural designs, maps, computer-aided drawings etc. by plotting lines
using a pen. A printer uses the technology of joining closely spaced series of
small dots to print, whereas a plotter draws using a pen. Multicolour plotters use
different-coloured pens to draw in different colours.
Plotter
Speakers
Speakers are an output device that produce sound waves in the form of an output
which can be heard by a listener. Speakers can be attached to a computer or to
any other system like smartphones, tablets, Smart TVs, etc. to enhance the volume
and the quality of audio output. The different kinds of speakers range from simple,
two-speaker output devices to surround-sound multi-channel units.
Speakers
Projector
A projector is a display device that projects a computer screen onto a flat surface,
like a whiteboard or wall. It is most commonly used in home theaters or in
organisations for official presentations.
Projector
COMPUTER MEMORY
Computer memory holds raw data before it goes for processing and after processing it contains information which can
either be sent to output devices or stored in secondary storage devices for future use. There are two types of memory
in the computer—primary memory and secondary memory.
Primary Memory
This type of memory is necessary for a computer to work. It is also called the Internal Memory. This is the actual place
where the data is stored before it is taken to ALU for processing. Primary memory is of two types: RAM and ROM.
RAM (Random Access Memory)
It is temporary in nature. The computer holds information in this memory and gets it
when needed. It remembers what you tell them and can even change to remember
new information. It is volatile in nature, which means that data will be erased when
the computer is turned off. That's why you always save your work! RAM is considered
"random access" because any part of it can be accessed randomly for reading or writing Random Access Memory
of the data.
82 Trackpad Information Technology (Ver. 1.0)-IX

