This article is from the RCA SelectaVision VideoDisc FAQ, by firstname.lastname@example.org (Tom Howe) with numerous contributions by others.
The name used by RCA for the first couple of years of production was
"RCA SelectaVision VideoDiscs" which was later abbreviated to "RCA
VideoDiscs." Collectors usually call them CED's amongst themselves. The
name "Capacitance Electronic Discs" is not commonly used, and "CED
VideoDiscs" is actually redundant. I've had the most success with want
ads in newspapers and other venues with the name "RCA VideoDiscs." The
word SelectaVision is often associated exclusively with RCA VideoDiscs,
but the term actually originated in 1969 and applied to all three of
RCA's home video player research projects (Holotape, Magtape, and
VideoDisc), and ultimately was used for RCA's VHS videocassette
recorders (technology purchased from Matsushita rather than being
developed internally at RCA).