EXACTLY WHAT IS THE DIFFERENCE BETWEEN INCALL VS OUTCALL ESCORT DEFINED?

One of the major things that a beginner about the Manchester escorting scene isn't going to promptly realize is all of the terminology plus the abbreviations used! It could be the acronyms to the escort providers the Barnsley escorts use to indicate their specialities, or the customarily confusing Incalls and outcalls escorts. Who does what where??