As part of Phase 1: Strengthening the Infrastructures, Building the Federation, the three PDF presentations correspond to the three main sessions of the H2IOSC event, as described below. Session 1 - Results and Opportunities in Resources Alignment Chaired by Monica Monachini, CLARIN-IT Coordinator Making the Ecosystem Observable: Monitoring the SSH Landscape, by Valeria Quochi and Giacomo Mancuso Making Resources Comparable: Assessing Maturity Across Infrastructures, by Andrea Pandurino Making Resources Interoperable: Building a Common Semantic Framework, by Alessia Spadi Session 2 - Results and Opportunities in Services Availability Chaired by Alberto Bucciero, E-RIHS.it Delegate H2IOSC: an enabling platform for research and innovation in the Social Sciences and Humanities WP4 – Enabling Services, by Francesco Gargiulo Federated digital platforms: overview of services and path towards the H2IOSC ecosystem, by Bruno Fanini AEON: a platform for developing scientific workflows for the H2IOSC ecosystem, by Francesco Pinna DIGILAB E-RIHS: an integrated environment for advanced cultural heritage services, by Matteo Greco Interoperability in Heritage Science: tools to navigate standards and best practices, by Erica Scarpa and Riccardo Valente eScriptorium: a digital service for collaborative manuscript transcription, by Federico Boschetti Pilot H2IOSC: experimental services for heterogeneous research communities, by Enrico Pasini DPH: an integrated and modular digital environment for text sciences, by Chiara Aiola A pilot project for promoting Linguistic Linked Data, by Fahad Khan, Michele Mallia, Valeria Quochi and Giulia Pedonese Training and accessibility: training platforms within the H2IOS ecosystem, by Giulia Pedonese Session 3 - Challenges and Results in Resources Accessibility Chaired by Cristina Marras, OPERAS-IT Delegate The Marketplace, by Pierpaolo Sichera The Federation Pilot, by Francesco Pinna, Pierpaolo Sichera, Daniele Melaccio and Andrea Pandurino The orchestration, by Pierpaolo Sichera