Normal CDs cannot be modified -- they are read-only devices. But a CD-R disc needs to allow the drive to write data onto the disc. What's different about the CD-R?
How Optical Drives Work
How do CD business cards work?
How a CD is Made – Optical Disc Resurfacing Machines & Service
How CD Burners Work
Museum of Obsolete Media on X: CD-R Audio discs were introduced in 1997 for use in standalone audio CD recorders that required these special discs since copyright levies were applied to them.
How Does A Compact Disc (Or DVD) Work?
How do CD and DVD players work? - Explain that Stuff
Longevity of Recordable CDs, DVDs and Blu-rays — Canadian Conservation Institute (CCI) Notes 19/1
Blank CDR's for Backups - The Independent Video Game Community
NeweggBusiness - Blank CD/DVD Recordable Media Buying Guide
Maxell MXLCDR80MU30PK 700 MB Music CD-R Spindle 30/Pack, 1 - Baker's
Sold as 10/PK CD-R helps you safely burn your personal and work files for convenient use anytime. Features 52x write speed for quick data transfer and
STAPLES 483050 700MB 80MIN 52X CD-R Slim Jewel Case 10/Pack (32370)
How do CD and DVD players work? - Explain that Stuff
Longevity of Recordable CDs, DVDs and Blu-rays — Canadian Conservation Institute (CCI) Notes 19/1
Compact Disc - How Does A CD Player Work?