Image Courtesy Steve Shepard
The museum is looking for the a MITS (which stood for Micro Instrumentation
and Telemetry Systems) 816 calculator. The 816 was MITS' first electronic
calculator, offered as a kit, or as a fully assembled calculator. It was
announced first in the November, 1971 issue of Popular Electronics
magazine, as a construction article. The calculator utilized Japanese-made
(Iseden) Vacuum Fluorescent display tubes, and an 6-chip calculator chipset
made by Electronic Arrays. The machine offered the unusual capability of
providing calculation results to 16 digits via a key on the keyboard that
swapped the display between the lower and upper eight digits of results.
For more information, see the Old Calculator Web Museum
Exhibit on the MITS 7440
calculator, a later desktop scientific calculator offered by MITS, also as
a kit or fully assembled.