Bob Moore wrote:

Matt Whiting wrote

Gee, Bob, you should know the difference between a turbine
engine used as a propjet from one used as a pure jet. :-)

Hey! Eastern Airlines called them "Prop Jets".

The airline marketing departments purposely blurred the definitions in the
1950s. American called Electras "Jet Powered Flagships". Braniff called
them "Jet Power Electras". I seem to remember one airline declaring that
they had an all-jet fleet when they phased out their last piston aircraft,
but still flew turboprops.