Users are seeking free scientific calculators for PC, expressing dissatisfaction with the default Windows calculator in Windows 7. Alternatives discussed include Google’s online calculator, which offers unit and base conversions but lacks memory functions. Calc98 is mentioned as a free option, though some users find it comparable to the Windows calculator. The Windows calculator features Standard, Scientific, Programmer, and Statistics modes, but some users prefer calculators that allow full formula input before execution. Python shells are suggested for advanced functionality similar to MATLAB. Additionally, some users recommend physical scientific calculators, like the Casio FX-115ES, for convenience.