Mork claims that, on Ork, there is a substance known as Nuke-Away that comes in original Pine scent and a new Fusion scent, to "clean up tell tell nuclear waste" but yet when he is reporting to Orson later he asks Mork what Nuke means (i.e. short for nuclear), which makes no sense if there is product that uses Nuke in the name.
Pilot (1978) establishes that the show is set in a shared universe with Happy Days (1974) and Laverne & Shirley (1976). However, there are at least three times throughout the series when Mork and Mindy reference Laverne & Shirley as a fictional TV show.