Input Devices John Browns Requires Free Essay Example

Barcode reader

Barcodes are different groups of vertical bars that can be read by an optical scanner. Barcodes are printed on nearly every product that you can buy. Shops use them because they are cheap to produce and very durable. No At present, a barcode reader is not one of John Browns requirements. Maybe at a later stage he may decide to purchase one to make it easier to enter product information onto the computer.

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Keyboard

They are the most popular input peripheral.

Most computer systems come with one. It is easy to make mistakes when you are using a keyboard. There are some specialist keyboard like a Braille Keyboard which has fewer keys Yes Keyboard comes with the PC and the laptop Mouse This input is small (like a mouse) and has a ‘tail’ in the form of a wire connecting it to a computer. When it is moved, a pointer or cursor moves on the screen. Yes On the laptop, there is a touch pad; it is used instead of a mouse.

A mouse comes with the computer.

Roller ball

Can be used instead of a mouse, it is like an upside-down mouse. The user rotates the ball with their thumb or the palm of their hand. No John brown did not require a roller ball. maybe if he can require it later, if he want to used it rather than a mouse Scanner They used to scan photographs and other images so they can be put into document or web pages.

They can also be used to scan text into a word-processing. No John brown did not require a scanner. He should order one because he can scan photo of sport stuff limited on his websites to show customer.

Digital camera

It looks an ordinary camera expect there is not film and there is a screen on which you can view the picture you are taking. They have memory where the image is stored. they are expensive than a normal camera No John brown did not require a Digital camera. maybe he can purchase on so he can take picture of the shop to store on the computer Microphone Allows you to speak into a computer, and for the sound to be converted into data. Special software, called voice recognition software, is used to interpret the sounds.

No John brown did not require a microphone. Maybe he can purchase later so he can record data into the computer, it will save him time from typing data on the computer. Joystick Used for playing games. They are ideal for moving and making selections quickly. Disabled people use specially designed joysticks that can be operated by the foot or mouth. No John brown did not require a joystick. He does not need one because joystick is mostly for games and joystick are usually big so it will take space on a desk.