ArcheoFOSS XIV 2020: Open software, hardware, processes, data and formats in archaeological research collects the proceedings of the fourteenth ArcheoFOSS international conference, held online due to the outbreak of the COVID-19 pandemic. The book gathers seventeen papers on three principal topics, the main sessions of the conference: use and application of free/libre and open-source (FLOS) tools in archaeology; creation, use and promotion of open data and open formats in archaeology; and development and customization of FLOS software and hardware solutions for cultural heritage. Forty-one scholars of very diverse age, academic affiliation and geographic location, but all actively involved in the promotion of FLOS culture, open data and open science in digital archaeology and humanities, contribute. The volume is completed by a critical analysis of the contribution of these important annual meetings to the scientific and cultural activity of the ArcheoFOSS community. The opportunity offered by the pandemic-related difficulties to widen the geographical scope of the conference has been further boosted by the decision to adopt the English language for most of the papers, with the hope that this will extend the work of the ArcheoFOSS community far beyond the Italian national borders.