xcalc(1x) on Linux
The text 2bb677b344d9, as Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.1 (Buzz) shipped it.
scientific calculator for X
Flags it lists
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-rpn -
-stipple