CDR Recordable Compact Disk (CD-R) is a blank CD with the ability to be recorded onto. The unit that is used to write data to these blank CD’s is called a CD Writer or “Burner.” This unit is not unlike a normal CD drive, the difference being that it has two lasers one invisible, one visible. The invisible, is used for writing data onto the surface of the blank CD. The visible, is for reading information off the CD. The unit itself is currently for use in a computer system only, and therefor must be installed like a normal CD drive. The two CD drives then run coherently to copy data from one cd to another. CDR was introduced around 5 years ago, but really only became affordable