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• Plotter
A plotter is a specialised printer for producing high-quality drawings and blueprints. It is
larger and more expensive than standard printers but offers superior print quality. Ideal for
desktop publishing and architecture, it creates detailed and precise plans.
There are mainly two types of plotters: Drum Plotter and Flatbed Plotter.
Drum Plotter Flatbed Plotter
Speakers: They produce music, speech or other sounds from
the computer. These are also used for listening to songs and
watching movies on a computer.
Speakers
Projector: It is used to project the output from a computer
screen onto a large screen. It takes the input from the computer
in the form of an image and displays it on a widescreen. It is
widely used in schools, offices, and cinema halls.
Projector
Storage Devices
Storage devices are used to store data on a computer. There are a number of storage devices
such as the hard disk, CD, DVD, Blu-ray, and Flash Drive.
Hard Disk: It consists of one or more magnetic disks called platters.
Each disk in the pack has top and bottom surfaces on which data
is recorded using a magnetic head. It is usually used for permanent
mass storage. The most important function of the hard disk is to
Hard Disk
store program and data files.
It comes in a variety of sizes with storage capacities as high as 5 TB
(TeraByte) or even more. The CPU accesses data stored on the hard
disk much faster than it can access data on a CD.
External hard disks are also available. They can be connected to
a computer with the help of a USB port.
External Hard Disk
Clickipedia
The first hard disk was introduced by IBM in 1956. It could hold 5 MB of data.
Computer—Hardware Components 13

