This article is from the RCA SelectaVision VideoDisc FAQ, by firstname.lastname@example.org (Tom Howe) with numerous contributions by others.
I have personally seen a little over 1,700 NTSC CED titles, which is
close to the total number. There also appear to be a fair number of CED
vaporware titles, i.e. titles that were listed in publications as
available or soon to be available for the CED system, but which in fact
were never released. There were about 270 PAL/UK titles released on CED
in Great Britain.