| 2025 | 15 | Frontiers of Combining Systems - 15th International Symposium, FroCoS 2025, Reykjavik, Iceland, September 29 - October 1, 2025, Proceedings | Reykjavík | |
| 2023 | 14 | Frontiers of Combining Systems - 14th International Symposium, FroCoS 2023, Prague, Czech Republic, September 20-22, 2023, Proceedings | Prague | |
| 2021 | 13 | Frontiers of Combining Systems - 13th International Symposium, FroCoS 2021, Birmingham, UK, September 8-10, 2021, Proceedings | Birmingham | |
| 2019 | 12 | Frontiers of Combining Systems - 12th International Symposium, FroCoS 2019, London, UK, September 4-6, 2019, Proceedings FROCOS | London | 2019-09-04/06 |
| 2018 | | Frontiers of Combining Systems (FroCoS) FROCOS | Oxford | 2018-07-14/17 |
| 2018 | | International Joint Conference on Automated Reasoning IJCAR | Oxford | 2018-07-14/17 |
| 2017 | 11 | International Symposium on Frontiers of Combining Systems FroCoS | Brasília | 2017-09-27/29 |
| 2016 | 8 | International Joint Conference on Automated Reasoning FROCOS, IJCAR 2016, IJCAR | Coimbra | 2016-06-27 to 2016-07-02 |
| 2015 | 10 | International Symposium on Frontiers of Combining Systems FROCOS | Wrocław | 2015-09-21/24 |
| 2014 | 7 | International Joint Conference on Automated Reasoning FROCOS, IJCAR | Vienna | 2014-07-19/22 |
| 2013 | 9 | International Symposium on Frontiers of Combining Systems FroCoS 2013, FroCoS | Nancy | 2013-09-18/20 |
| 2012 | 6 | International Joint Conference on Automated Reasoning FROCOS, IJCAR 2012, IJCAR | Manchester | 2012-06-26/29 |
| 2011 | 8 | International Symposium on Frontiers of Combining Systems FroCoS | Saarbrücken | 2011-10-05/07 |
| 2010 | 5 | International Joint Conference on Automated Reasoning FROCOS, IJCAR 2010, IJCAR | Edinburgh | 2010-07-16/19 |
| 2009 | 7 | International Symposium on Frontiers of Combining Systems FroCoS | Trento | 2009-09-16/18 |
| 2008 | 4 | International Joint Conference on Automated Reasoning FROCOS, IJCAR 2008, IJCAR | Sydney | 2008-08-12/15 |
| 2007 | 6 | International Symposium on Frontiers of Combining Systems FroCoS 2007, FroCoS | Liverpool | 2007-09-10/12 |
| 2006 | 3 | International Joint Conference on Automated Reasoning FROCOS, IJCAR | Seattle | 2006-08-17/20 |
| 2005 | 5 | International Workshop on Frontiers of Combining Systems FroCoS | Vienna | 2005-09-19/21 |
| 2004 | 2 | International Joint Conference on Automated Reasoning FROCOS, IJCAR | Cork | 2004-07-04/08 |
| 2002 | 4 | International Workshop on Frontiers of Combining Systems FroCoS | Santa Margherita Ligure | 2002-04-08/10 |
| 2001 | 1 | International Joint Conference on Automated Reasoning IJCAR | Siena | 2001-06-18/23 |
| 2000 | 3 | International Workshop on Frontiers of Combining Systems FroCoS | Nancy | 2000-03-22/24 |
| 1998 | | Frontiers of Combining Systems, Second International Workshop, FroCoS 1998, Amsterdam, The Netherlands, October 2-4, 1998, Proceedings FROCOS | Kingdom of the Netherlands | 1998-01-01 |
| 1996 | | Frontiers of Combining Systems, First International Workshop FroCoS 1996, Munich, Germany, March 26-29, 1996, Proceedings FROCOS | Munich | 1996-03-26/29 |