21. University of Pennsylvania, LJS 27 DS ID: DS140 Title: Algorismus Author: Pietro Paolo Muscarello Place: Nola Date: 1478.
22. Princeton University, Islamic Manuscripts Garrett no. 2495Y DS ID: DS14646 Title: Farāʼiḍ al-Sirājīyah Date: 1256 [1840 or 1841
23. Princeton University, Islamic Manuscripts Garrett no. 24B DS ID: DS17543 Title: Arabic texts Date: 1600-1699
24. Princeton University, Islamic Manuscripts New Series no. 813 DS ID: DS17565 Title: Khulāṣat al-ḥisāb Date: between 16--? and 1793