  These lecture notes provide an introduction to mm/submm extragalactic
astronomy, focused on AGN studies, with the final goal of preparing students to
their future exploitation of the ALMA capabilities. I first provide an overview
of the current results obtained through mm/submm observations of galaxies and
AGNs, both local and at high redshift. Then I summarize the main mm/submm
facilities that are currently available. ALMA is then presented with a general
description and by providing some details on its observing capabilities.
Finally, I discuss some of the scientific goals that will be achievable with
ALMA in extragalactic astronomy, and for AGN studies in particular.
