Issue 34.1, 2022 of the journal Archeologia e Calcolatori it is characterized by the publication of the Proceedings of two international Conferences. The first concerns the sixteenth edition of the ArcheoFOSS Conference, entitled "Open Software, Hardware, Processes, Data and Formats in Archaeological Research", held in Rome on 22-23 September 2022 at the Digilab headquarters of the Sapienza University of Rome. The Proceedings, edited by Julian Bogdani and Stefano Costa, include 21 articles which clearly testify to the success and vitality of the initiative, born in 2006, which has been given space on several occasions in the pages of the journal. The second part of the volume, which collects 14 contributions, was edited by Carlo Citter and Agostino Sotgia and is dedicated to the Proceedings of the special session “Modelling the Landscape. From Prediction to Postdiction” of the seventh edition of the Landscape Archeology Conference (Iași, Romania 10-15 September 2022). This is a theme dedicated to the use of models for the study of ancient landscapes, considered both through the "traditional" predictive approach, because it has been in use since the XNUMXs, and through the postdictive one, which the curators define as more "experimental".