later on about how that, how that instruction happens. so, I, I think a good first question for running in programs is like, alright, well, what is a program? so, I'll look at the, the right hand side of this diagram. so a program, and I'll sort of use this as my running example Firefox. so a program is made, actually of just an enormous sequence of these very simple machine code instructions. and so, when Firefox is, is running on your computer, that means somewhere in RAM, there's a block of these instructions such that running them has, you know, does the things that Firefox does. 