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A scientific calculator app for 68K (or PPC) Macs.
Jeff-s-Calculator-1-0.1-68k.sit (273.78 KiB / 280.36 KB)
Jeff's Calculator for 68K v1.0.1 (1998) / compressed w/ Stuffit
At least 2MB of free RAM
Mac OS 7.x - Mac OS 9.2.2
Emulating this? It should run fine under: Basilisk II