- Letter writing, Arabic1
- Loans (Islamic law)1
- Local officials and employees--Salaries, etc.1
- Magnetism1
- Manuscripts, Armenian1
- Manuscripts, French1
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Oriental1
- Manuscripts, Spanish1
- Marginalia1
- Mashāriq al-anwār (Ṣaghānī, al-Ḥasan ibn Muḥammad)1
- Masjid al-Ḥarām1
- Massachusetts--Boston1
- Materia medica1
- Mathematics1
- Maṣābīḥ al-sunnah (Baghawī, al-Ḥusayn ibn Masʻūd)1
- Mediterranean Region1
- Mediterranean Sea1
- Mehmed II, Sultan of the Turks, 1432-14811
- Metaphysics1