A Burned Disc
You can see the "burned" part of this CD-R disc by noticing the slight change in reflectivity on the recording side. In this example, the arrow points to the end of the small recorded area, which is less than 6% of the 700MB capacity of the disc.
Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.Copyright © 1981-2010 by Computer Language Company Inc. All rights reserved.

Three burning candles.
Licensed from iStockPhoto
Learn more about burn