Ok!
HWEP - Heavy weapons. Anything blunt, most things improvised, unarmed, and large blades (like greatswords) go here. STR-based.
LWEP - Light, sharp blades and pointy bits. DEX-based.
RWEP - Any ranged weapons. WIS-based.
DMAG - Damage-dealing magic and some minor debuffs related to damage type. INT-based.
HMAG - Healing, buffs, debuffs, etc. CON-based
IMAG - Illusions, mobility, divinations, wibbly-wobbly ethereal-smethereal stuff... sort of a catch-all for non-combat stuff. CHA-based.