MANY programming projects, and other projects in my past relied on Calculus knowledge. Some of the programs could have been written without it, but that would have vastly complicated the program, and caused the program to underperform.

Put it this way: the Roman Empire actually came tantalizing close to producing the industrial revolution about 2000 years ahead of the actual industrial revolution, give or take.

In fact, the romans even had a few actual working steam engines! For example, there was one temple in which worshippers would light a fire beneath a metal sphere filled with water, which would produce steam running through pipes and open a set of giant doors.

But... in the end, all that amazing engineering power of the Roman Empire was, as some suggest, greatly held back because the roman-numeral system does not allow for Calculus.

In the end: the solutions I program use Calculus, and it makes the program far-far more powerful. (I could in some cases do without it, but the programs would become far more complicated, and suck!)

The solutions you program do not seem to need Calculus. Not all solutions do. But a LARGE number of computer programs running in the world today do indeed rely in some on Calculus.