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are +plastic credit card style cards that differ from normal dumb magnetic stripe cards by having a higher storage capacity and a embeddesd processor.

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bank cards , credit cards , hotel key cards and some frequent traveller cards feature a magnetic stripe on the reverse side , and in many places tickets for public transport now use the same technology to process passengers through automated gates , and to reduce fare dodging.

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uses a laser to shine light onto a barcode label. Barcode are most commonly used on items in supermarkets but they also have other applications such as identifying packages that are sent by courier firms.

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Joysticks and game pads are two common input devices used by games players. These are many different configurations available that include a variety of bottons and features.

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are often used with video-conferencing and Voice video too - between two computers over the internet .

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users to interact with computers using their hand or a specially designed pen called a STYLUS.

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are common input devices on laptop, where there is usually not enough space for a mouse.

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consists of a relatively large ball which is fixed in place so that the user can spin it around , controlling a pointer on the screen

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is the standard pointing devide on most desktop computers. A typical computer mouse has two buttons and many also have a scroll wheel in the centre to perform tasks like scrolling through documents or wed pages.

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is a keyboard that is represented by a series of buttons drawn on a monitor or screen . A soft keyboard uses a combination of hardware and software.

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are useful in situations where the user needs to make a quick selectionof choices from pre-set options. They are often used in restaurants to enter the items a customer has purchased.

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is present on virtually all laptop and desktop computers . The keyboards has changed very little over the years.

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are items of hardware that allow entry of information into the computer . This information may be text , images , sound , or even movements .