Plotter : - It is a device giving hardcopy output like a printer. Which is used to obtain high quality drawings and graphs on large paper, it is mainly used in engineering, architect, building construction, city planning, map making, CAD and CAM etc.
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Speaker :- It is an output device, used with multimedia, which presents a softcopy of the output in the form of sound. For this, it is necessary to have a sound card in the system unit. The speaker converts the electrical waves received from the sound card into sound waves. There is a small speaker inside the computer system unit, which is called Built-in Speaker. It is called Multimedia Speaker. It has an amplifier and Volume Control Knob to increase or decrease the volume.
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Projector :- It is a softcopy output device. The events happening on the computer screen and the pictures and information can be shown on the big screen. So that it can be seen by a group of people. It is used for Multimedia Presentation. In which voice, pictures, movies and animations are used. It is used to display computer output to a large group during training, meeting, conference etc. or for entertainment.
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