I vaguely remember being told that there are two kind of soreness after exercise, one indicate good things (e.g. your muscle is being trained) and the other bad (e.g. you didn't warm up or cool down properly), and both have their fancy name and acronyms.
Is such distinction accurate? Do they differ in a way that I can notice, e.g. can I tell by the duration, the "feel", or the location of the soreness?