A discussion has come up with my friends and me, all of which are native German speakers, and apparently my family is the only one saying "der Navi" as in "der Navigator" for the thing in the car giving you instructions on where to drive. The others say "das Navi" as in "das Navigationssystem". Even the Duden says "das Navi" only. So I'm now wondering if my family is really that unique in that and if you have found other examples of different articles because of disagreements on what something is short for. Is there maybe someone out there saying "die Navi"?