- Kharijites1
- Khawwāṣ, Aḥmad ibn ʻAbbād, 1378?-1454. Kāfī fī ʻilmay al-ʻarūḍ wa-al-qawāfī1
- Khayālī, Aḥmad ibn Mūsá, -1457? Ḥāshiyah ʻalá sharḥ al-Taftāzānī1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Kings and rulers1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)8
- Language and languages--Philosophy4
- Latin literature1
- Leather doublures4
- Liturgics2
- Logic11
- Mabādiʼ fī al-taṣrīf (Zanjānī, ʻAbd al-Wahhāb ibn Ibrāhīm)2
- Maghribī, Aḥmad ibn ʻAbd al-Razzāq, -1684 or 1685. Manẓūmat al-shuhadāʼ1
- Magic squares1
- Malikites2
- Manicules3
- Manuscripts, Arabic299
- Manuscripts, Byzantine1
- Manuscripts, English (Middle)1
- Manuscripts, Greek1