The Compact Disc Digital Audio System
offers the best possible sound reproduction -- on a small, convenient sound-carrier unit.
The Compact Disc's superior performance is the result of a laser-optical scanning combined with digital playback, and is independent of the technology used in making the original recording.
The recording technology is identified on the back cover by a three-letter code:
[DDD] Digital tape recorder used during session recording, mixing and/or editing, and mastering (transcription).
[ADD] Analogue tape recorder used during session recording; digital tape recorder used during subsequent mixing and/or editing and during mastering (transcription).
[AAD] Analogue tape recorder used during session recording and subsequent mixing and/or editing; digital tape recorder used during mastering (transcription).

In storing and handling the Compact Disc, you should apply the same care as with conventional records.
No further cleaning will be necessary if the Compact Disc is always held by the edges and is replaced in its case directly after playing. Should the Compact Disc become soiled by fingerprints, dust or dirt, it can be wiped (always in a straight line, from centre to edge) with a clean and lint-free, soft, dry cloth. No solvent or abrasive cleaner should ever be used on the disc.
If you follow these suggestions, the Compact Disc will provide a lifetime of pure listening enjoyment.