Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 293, Kitāb al-Bayān wa al-tidhkār fī sanʻat ʻamal al-ghubār, written by Abū Bakr al-Ḥaṣṣār. This manuscript was written in Baghdad in A.H. 590 (1194), in Arabic, and it is a near-contemporary copy of the first volume of the Book of demonstration and recollection in the art of dust-board reckoning, a 12th-century treatise on arithmetic and algebra.
You can see the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata at OPenn.
The Schoenberg Institute for Manuscript Studies 