The Rainbow Books are a collection of Compact Disc format specifications.
CD-DA (Digital Audio) – standardized as IEC 60908
CD-Text – a 1996 extension to CD-DA
CD+G (plus Graphics) – karaoke
CD+EG / CD+XG (plus Extended Graphics) – an extension of CD+G
CD-i (Interactive)
CD-ROM (Read-Only Memory) – standardized as ECMA-130 and ISO/IEC 10149
CD-ROM XA (eXtended Architecture) – a 1991 extension of CD-ROM
Orange is a reference to the fact that red and yellow mix to orange. This correlates with the fact that CD-R and CD-RW are capable of audio ("Red") and data ("Yellow"); although other colors (other CD standards) that do not mix are capable of being burned onto the physical medium. Orange Book also introduced the standard for multisession writing.
CD-MO (Magneto-Optical)
CD-R (Recordable) alias CD-WO (Write Once) alias CD-WORM (Write Once, Read Many) – partially standardized as ECMA-394
CD-RW (ReWritable) alias CD-E (Eraseable) – partially standardized as ECMA-395
PCD (Photo)
CD-i Bridge - a bridge format between CD-ROM XA and the Green Book CD-i, which is the base format for Video CDs, Super Video CDs and Photo CDs.
VCD (Video)
SVCD (Super Video, 1998) – a 1998 extension of VCD, standardized as IEC 62107 in 2000.
E-CD/CD+/CD Extra (Enhanced)
SACD (Super Audio)
DDCD (Double Density)
