Open Science Fair is bi-annual conference aims to bring together and empower open science communities and services; -to identify common practices related to open science; -to see what are the best synergies to deliver and operate services that work for many; and -to bring experiences from all around the world and learn from each other OSFair 2021 was recently conducted online focusing on below topics; Interdisciplinary collaborations: Networks, services, methods Sustaining Open infrastructures, services and tools for research communities Value added data products/services from open science Training and skills for open science European Open Science Cloud (EOSC) and FAIR data Citizen science: barriers and opportunities for collaboration If you missed attending the sessions of OSFAIR2019, you can now watch the recorded sessions from  https://www.youtube.com/playlist?list=PLImfYosa1bhhW8_DdCBjR9kiqLewuAMCA    OSFAIR 2019 sessions can also be watched from https://www.youtube.com/playlist?list=PLImfYosa1bhjUiZOxB0ipL5vvgGslbXv3      ------------------------- Dr. J. K. VIJAYAKUMAR, King Abdullah University of Science & Technology (KAUST), https://www.linkedin.com/in/vijayakumarjk/