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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 a 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 TV, 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   Random Access Memory
                 writing of the data.

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