| AMBIENT 2021 | Eleventh International Conference on Ambient Computing, Applications, Services and Technologies | Barcelona | Spain | Jul 5 | Oct 3 | Oct 7 |
| ICCTD 2021 | 10th International Conference on Computer Technologies and Development | Barcelona | Spain | May 25 | Oct 15 | Oct 17 |
| GLOBECOM 2021 | IEEE Global Communications Conference | Madrid | Spain | | Dec 7 | Dec 11 |
| ICIEA 2022 | 9th International Conference on Industrial Engineering and Applications | Barcelona | Spain | Jul 30 | Jan 12 | Jan 14 |
| ICKEM 2022 | 12th International Conference on Key Engineering Materials | Barcelona | Spain | Feb 15 | Mar 18 | Mar 20 |
| MatDes 2022 | 4th International Workshop on Materials and Design | Barcelona | Spain | Feb 14 | Mar 18 | Mar 20 |
| ICEEEP 2022 | 6th International Conference on Energy Economics and Energy Policy | Barcelona | Spain | Mar 10 | Apr 20 | Apr 22 |
| ICACER 2022 | 7th International Conference on Advances on Clean Energy Research | Barcelona | Spain | Mar 10 | Apr 20 | Apr 22 |
| SOFTENG | SOFTENG 2022, The Eighth International Conference on Advances and Trends in Software Engineering | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| SPACOMM 2022 | The Fourteenth International Conference on Advances in Satellite and Space Communications | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| CTRQ | The Fifteenth International Conference on Communication Theory, Reliability, and Quality of Service | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| PESARO 2022 | The Twelfth International Conference on Performance, Safety and Robustness in Complex Systems and Applications | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| ALLDATA | The Eighth International Conference on Big Data, Small Data, Linked Data and Open Data | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| ICONS 2022, | The Seventeenth International Conference on Systems | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| ICN 2022 | The Twenty-First International Conference on Networks | Barcelona | Spain | Jan 10 | Apr 24 | Apr 28 |
| ICAMS 2022 | 9th International Conference on Advances in Management Sciences | Madrid | Spain | Apr 30 | Jun 15 | Jun 17 |
| ICDLE 2022 | 13th International Conference on Distance Learning and Education | Barcelona | Spain | Sep 25 | Oct 28 | Oct 30 |
| ICETC 2022 | 14th International Conference on Education Technology and Computers | Barcelona | Spain | Sep 25 | Oct 28 | Oct 30 |
| PEEE 2022 | 3rd International Conference on Power, Energy and Electrical Engineering | Barcelona | Spain | Oct 5 | Nov 18 | Nov 20 |
| ICACER 2023 | 8th International Conference on Advances on Clean Energy Research | Barcelona | Spain | Mar 15 | Apr 28 | Apr 30 |
