I'm trying to find some info about the LK-3000, an
early hand-held
"computer". I think it was made by Nixdorf around 1979, but it was also
sold under other labels (I think I've got a "Lexicon" labeled instance
someplace).
My Lexicomm was made in Taiwan around 1995, the only older small handhelds
I know of are MTS (something like that) and are actually "terminals" used
for taking inventory via some small backed up memory.