  The Fifth International Conference on Applied Category Theory took place at
the University of Strathclyde in Glasgow, Scotland on 18-22 July 2022. This
conference follows the previous meetings at Leiden (2018), Oxford (2019), MIT
(2020, fully online), and Cambridge (2021). The conference comprised 59
contributed talks, a poster session, an industry showcase session, and a
session where junior researchers who had attended the Adjoint School presented
the results of their research at the school. Information regarding the
conference may be found at (https://msp.cis.strath.ac.uk/act2022).
  The contributions to ACT2022 ranged from pure to applied and included
contributions in a wide range of disciplines in science and engineering.
ACT2022 included talks in linguistics, functional programming, classical
mechanics, quantum physics, probability theory, electrical engineering,
epidemiology, thermodynamics, engineering, and logic. ACT2022 was sponsored by
Huawei, Protocol Labs, Cambridge Quantum, Conexus, Topos, and SICSA (Scottish
Informatics and Computer Science Alliance).
  Submission to ACT2022 had three tracks: extended abstracts, software
demonstrations, and proceedings. The extended abstract and software
demonstration submissions had a page limit of 2 pages, and the proceedings
track had a page limit of 14 pages. Only papers submitted to the proceedings
track were considered for publication in this volume. In total, there were 97
submissions, of which 59 were accepted for presentation and 24 for publication
in this volume. Publication of accepted submissions in the proceedings was
determined by personal choice of the authors and not based on quality. Each
submission received a review from three different members of the programming
committee, and papers were selected based on discussion and consensus by these
reviewers.
