delabs GUI Enhanced Scientific Calculator by Stephen Ostermiller
Then i just Skinned it, added a GUI, A Scientific Mode or Turbo Switch. A Tape for History Integrated.
Another thing called Sound Calculator also in this project. It is Incomplete.
Calculator with dual display and visual entry verification. Digital Calculator with basic functions and Multiple Memory. It has Dual LED display, Verify entry and event sounds.
I feel i am not able to complete the Sonic Calculator project, i am now trying to build something sensible. Deriving knowledge and inspiration from https://ostermiller.org/calc/calculator.html