Armor
  Items used for defence(example: flak jacket)
Weapons
  Items used for attacking(example: sniper rifle)
Jewelry
  Items the boost player stats(example: necklace with +5 agility)
Item Enhancement
  Processes used to boost item stats(example: adding ice damage to a sword)
Engineering
   Items used to "add" to items(example: a scope for a rifle to add range)