مايكل سكوت
The first appearance of the manuscript was in 1202. No copies of this version are known. A revised version of "Liber Abaci," dedicated to Michael Scot, appeared in 1227 CE. There are at least nineteen manuscripts extant containing parts of this text. There are three complete versions of this manuscript from the thirteenth and fourteenth centuries. There are a further nine incomplete copies known between the thirteenth and fifteenth centuries, and there may be more not yet identified.