Style when mixing arguments/methods from a computer program with text and math

Question

I'm working on a document that is a cross of user's guide and a technical manual. I describe a system which has variables that I handle normally, then introduce an R package that I've written which deals with some of the same variable. My question is how to deal with the computer package-related components. For (1) the name of the package, (2) function (method) names, and (3) variable/parameter/argument names: Should they be set in a \texttt/\verb style inline and in equations? Should they be capitalized at the beginning of a sentence? Or should I avoid using them at the beginnings of sentences?

Essentially, I'm asking a broader version of How to typeset variables and other code?.

Answer 1

There's no right answer to this. One pointer though, pick a convention and define it clearly (I mean real hand holding) at the beginning of your manual. The listings package is your friend for code, math should be math. Avoid changing the case of your method/function/variable names at the beginning of sentences.