An accessory is something used with a computer that provides additional convenience for a user, but is not required for the device to function. An example of an accessory is a laptop stand, which can make working on a laptop more enjoyable, but provides no additional functionality to the computer. Accessories can add additional functions to your computers. Others make your daily work more comfortable or easier. Some will come with your computer as standard, while others can be added as required. Accessories such as a keyboard and mouse may be essential in order to operate your computer. Others - such as headphones, cameras, graphics tablets and barcode readers - may be useful for specialist tasks or the facilitate certain ways of working.