From 1985 - HP 150 TouchScreen goes for >$400 !

[Tony Duell]

> 
> At 12:55 AM 5/19/05 +0100, you wrote:
> >> I think I have the touchscreen frame from one of those, 4 circuit
> >> boards linked together in a box, with a lots of LEDs and
> >> phototransistors.  Always been curious what it came out of.
> >
> >Quite possibly, that's how the touchscreen worked on the 150.
> >
> 
>    It was also a option in one of the terminals but I forget which one. I
> have a loose board of LED/Phototransistors that I found was used to
> retrofit Touchscreen capability into one of the terminals.

I once saw an HP monitor with a pair of HP-HIL connectors on the back... 
Intrigued, I waited for the 'owner' (actually user) to leave, and then 
cautiously pulled the case. It turned out it could take the same 
touchscreen option as the HP150-II, and that these were the connectors 
for that.

No, I can't remember model numbers, etc.

-tony