This book constitutes the refereed proceedings of the 14th International Symposium on Frontiers
of Combining Systems FroCoS 2023 held in Prague Czech Republic in September 2023. The
symposium was co-located with the 32nd International Conference on Automated Reasoning with
Analytic Tableaux and Related Methods TABLEAUX 2023. The 14 papers presented were thorouhgly
reviewed and selected from the 22 high-quality paper submissions. They are grouped in the
volume according to the following topic classification: analysis of programs and equations
unification decidable fragments frameworks higher-order theorem proving. This is an open
access book.