From Prestel to Prodigy

Another instalment from Creatures of Thought:

(Some previous posts noted in the thread
An ARPANET history (blogged)

Interesting to learn that early Prestel was named Viewdata. If I recall this right, the international QWERTY Minitel terminals went by the name Viewdata terminals. Is there a direct connection? (At least, Minitel also uses Prestel graphics, but is there more to this?)

My informal understanding is that Viewdata is meant to refer to the technology, and Prestel to one particular service. Wikipedia says this:

See also