What is code called when all it does is prepare data for an algorithm or handle output data?

I find that in projects I've worked in, actual algorithms don't take up many lines of code. The rest of the code is just to prepare the data for the algorithm, or to take its output and pass it on to something else. It can almost be described as procedural, doing some math or string operations, etc.

I think the term boilerplate code isn't right as I thought this refers to things that have to be there regardless of what the code does (i.e. methods in a class definition).

Ideas?