Categories

1. Generally, groupings of objects or phenomena according to similar properties and characteristics.

2. The grouping of properties and characteristics into fundamental classes using analytical reduction.

3. The must fundamental classes of concepts of universal properties, such as moving or stationary.

4. In Pluto: essence or being, motion, rest, sameness or identity, and difference.

5. In Aristotle: essence, quantity, quality, relation, place, time, position, state, action and affection.

6. In religious philosophy the categories exist apart from matter, as divine forms, archetypes, or energies (cf. sephiroth in Kabbalah).

7. In scientific philosophy new categories have been added such as system and structure.