  In this chapter, we review some features of particle acceleration in
astrophysical jets. We begin by describing four observational results relating
to the topic, with particular emphasis on jets in active galactic nuclei and
parallels between different sources. We then discuss the ways in which
particles can be accelerated to high energies in magnetised plasmas, focusing
mainly on shock acceleration, second-order Fermi and magnetic reconnection; in
the process, we attempt to shed some light on the basic conditions that must be
met by any mechanism for the various observational constraints to be satisfied.
We describe the limiting factors for the maximum particle energy and briefly
discuss multimessenger signals from neutrinos and ultrahigh energy cosmic rays,
before describing the journey of jet plasma from jet launch to cocoon with
reference to the different acceleration mechanisms. We conclude with some
general comments on the future outlook.
