  In recent years charm physics has undergone a renaissance, one which has been
catalysed by an unexpected and impressive set of experimental results from the
$B$-factories, the Tevatron and LHCb. The existence of $D^0\bar{D}{}^0$
oscillations is now well established, and the recent discovery of $CP$
violation in $D^0$ decays has further renewed interest in the charm sector. In
this article we review the current status of charm-mixing and $CP$-violation
measurements, and assess their agreement with theoretical predictions within
the Standard Model and beyond. We look forward to the great improvements in
experimental precision that can be expected over the coming two decades, and
the prospects for corresponding advances in theoretical understanding.
