On a Dutch auction site I acquired a nice fully functional ESI calcumeter 4100.
This handheld device combines a RPN based calculator with a 3 1/2 digit digital multimeter.
A picture of this calcumeter is available
here.
On the internet I couldn't find any information about this device.
Where to find more information?
Edited: 27 May 2013, 12:57 p.m. after one or more responses were posted