This article is from the RCA SelectaVision VideoDisc FAQ, by firstname.lastname@example.org (Tom Howe) with numerous contributions by others.
Nipper is the dog in the familiar RCA trademark where the terrier mutt
peers attentively into the brass horn of a gramophone waiting to hear
"His Master's Voice." This actually originated in an 1895 oil painting,
and became a registered trademark in 1900, sometime later being acquired
by RCA. The trademark fell into disuse in 1968 when Robert Sarnoff (son
of RCA founder David Sarnoff) became CEO and instituted the red acrylic
systems logo (still in use today in different colors). But Nipper came
back when Edgar Griffiths became head of RCA, later appearing on the
nameplate of the SFT100 VideoDisc player, and appearing on all the disc
caddies during the first year of production. Thus "Nipper's Revenge"
refers to his comeback in a "needle" based unit similar to the original
gramophone. And even though corporate RCA no longer exists, Nipper and
his young sidekick Chipper are still popular trademarks today.