Context: Compact Disc (CD) is a digital optical disc data storage format. The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD, PictureCD, CD-i, and Enhanced Music CD. Audio CDs and audio CD players have been commercially available since October 1982.

Question: When did Audio CDs become available for purchase?
Answer: 1982

Question: What does CD stand for?
Answer: Compact Disc

Question: What were CD's originally created to store?
Answer: sound recordings

Question: What does SVCD stand for?
Answer: Super Video Compact Disc

Question: In what year were compact discs realesed for purchase?
Answer: 1982

Question: What was the original intended format for CDs?
Answer: data storage

Question: What year were CDs changed so that they could store data?
Answer: Unanswerable

Question: What does ROM in CD-ROM stand for?
Answer: Unanswerable

Question: Which was released first; CD-R or CD-RW?
Answer: Unanswerable

Question: Who created the CD?
Answer: Unanswerable

Question: What does CD-i stand for?
Answer: Unanswerable