Title
- Nūr al-wahhāj fī al-kalām ʻalá al-isrāʼ wa-al-miʻrāj1
- Nūr al-ʻuyūn1
- Nūr al-ʻuyūn fī talkhīṣ siyar al-amīn al-maʼmūn1
- Odes1
- Office of the Dead1
- Office of the Mother of God1
- Omnes ad praeda venient1
- Omnium gentium mores, leges, et ritus1
- On Questions in Aristotle’s Nicomachean Ethics1
- On accounting and commissions1
- On charms and talismans1
- On generation and corruption1
- On mnemonics and memory1
- On the Anger of God1
- Opusculum de formandis epistolis1
- Ordinances1
- Organon1
- Orthographia1
- Ottoman Turkish expansion on qaṣīdat al-Burdah1
- Ottoman letters1