Brand: | Unknown |
Model: | US-80R |
Type: | Calculator |
Picture: |
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Batteries: | AA x 4 |
Lifetime: |
Introduced: unknown Terminated: unknown |
Notes: |
The US-80R is a quite heavy calculator with an nine-digit fluorescent display,
eight for accuracy and the left one for overflow indication "C" and for displaying
the minus for negative numbers. Probably from the mid-1970’s.
![]() A slider can be used to have multiplication and division repeat after pressing the = key repeatedly. The first number entered is the number used for the repeat. So to repeatedly multiply a number by two, enter "2 x [number] =" with the orange slider set to "K" and repeat by entering another number and pressing =. The battery compartment at the bottom slides out together with the batteries. It is quite hard to remove. To remove it I needed to use a so-called black stick, a teflon instrument to pry without leaving marks. |
©2025 Ernst Mulder