Version 0.1 (November, 2000) provided access to the first "Beta" version of the Tre Maggiori data. Version 0.2 (April, 2000) added 1500 missing cases among Buonuomini and Gonfalonieri di Compagnia in the period 1350-1375 and corrected some inconsistencies in spelling of names throughout the data file. Version 1.0 (November 2001) added the Guild Elections and Birth Registration series, and modifed the programming and documentation to accomodate the new series. Version 1.1 (April 2003) added 2,014 additional birth registrations, Italian translations of the documentation, and further editing of names in the data set to incorporate inconsistencies noticed since the publication of Version 1.0.