The ten classical categories are:
1. Substance (jawhar) — something existing in itself.
2. Quantity (kamm) — magnitude or number.
3. Quality (kayf) — what something is like.
4. Relation (iḍāfah) — relation to another.
5. Place (ayn) — relation to location.
6. Having (milk) — an enveloping condition.
7. Action (fi‘l) — progressively causing an effect.
8. Passion (infi‘āl) — progressively receiving an effect.
9. Time (matā) — relation to time.
10. Position (waḍ‘) — arrangement of parts.
Substance is one category; the other nine are accidental categories. Each example is classified with respect to the relevant aspect.