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Old Windows 3.1 era MathCAD before the company ruined the UI. Extremely easy to use and powerful symbolic math engine and helped me learn calculus. My dad used

by api 8y ago

Old Windows 3.1 era MathCAD before the company ruined the UI. Extremely easy to use and powerful symbolic math engine and helped me learn calculus. My dad used to model a lot of analog signal processing and acoustic stuff.