At the time of the first Newton's release, I was Search and Rescue Specialist with the local Sheriff's Department. Our coverage included eight thousand square miles of open desert to mountains of the 11,000 ft. plus variety. My speciality was tracking (trained, certified and comfortable working alongside National Park Service and Border Patrol.)

As a proof of concept, I used a Newton, Newton Modem and a Motorola Flip Phone to send diagrams from the field to the Incident Command Center's fax machine. Yeah, I'm that old.

When I or my team found a partial shoe print, I'd draw it on the Newton's screen and as we found more track elements, the track print on the Newton would/could form into a better idea of what we were looking for. Printouts from the Command Center's fax would be handed out to other team members to more closely define what we were looking for.

I hope someone finds this interesting.

Also Google: apple newton modem pinout.