The Compact Disc naming and logo originate from January 1979, an era pre-sony and four years before market introduction of the CD. It also shows the roots of the CD-i logo

These documents show a historically very relevant piece of history about the Compact Disc logo in general, but also the CD-i specifically, as the design is based on each other. It shows that Philips (perhaps even without Sony?) developed the Compact Disc naming, logo and for a certain part the standard before 1979, four years before the official market introduction. (A 'trick' they repeated with the launch of CD-i as this was also developed 5 years before the official launch). Nowadays, these long periods between developing and market introduction would never be allowed anymore. It is remarkable to see the naming and logo were apparently ready in 1979, as this is right in the heydays of LaserVision. The CD logo forms the base of the CD-i logo, evolving into a family of discs starting with CD Audio (Red Book standard, 1980) and followed by more Rainbow Books: CD-i (Green Book standard, 1986), CD-ROM (Yellow Book standard, 1988), Photo CD (Beige Book standard, 1992), Video CD (White Book standard, 1993), Super Audio CD (Scarlet Book standard, 1999) (and others).

CD-i member Jorg Kennis comments: "The early date is very interesting. Remember that that was almost 4 years prior to market introduction! I am surprised that the naming and logo were already established by then. This was very short after the introduction of LaserVision, I would have expected for example that they tried to market this audio disc as part of that family (like they later did in reverse, when LaserVision was rebranded CD-Video). Also: Was Sony already involved at this stage, and did they have a hand in the naming/branding at all (or could we fully credit that to Philips)? It *would* be nice for a museum. But the Philips museum seems to be too much "general public"-focused to be interested in specific material like this."