Basically, read the forum descriptions. We try to separate discussions and threads, based on the type of discussion (rather than the subject matter, generally speaking.) The distinction between forums can be somewhat subjective and a bit fuzzy.
PLEASE NOTE: It is generally not a big deal if you inadvertently post in the wrong forum, a moderator will move it. We have the forums as a convenience to other posters. Having your thread moved is not a slap in the face, nor a warning, unless you’re doing it persistently.