The first in dash CD player should be on the list.

Also the first radar detector.

I'd nominate the hp 95LX as the first pocket computer, even before the
Newton.

I'd also put the Timex Ironman on the list. This little simple
multifunction watch is the best selling "computer" ever produced. I
own three including the one I'm wearing now which is 20 years old and
predates "Indiglo."

50 years is a long time. How about the Bullova Accutron "tuning fork"
watch.

No GPS? Surely I'd put the Garmin eTrex series on the list, or the
Gecko.

Bicycle computers.

Leatherman multi-tools.

That list is too far weighted towards audio and not broad enough in
scope.