  During the last 20 years, TeV astronomy turned from a fledgling field, with
only a handful of sources into a fully-developed astronomy discipline,
broadening our knowledge on a variety of types of TeV gamma-ray sources. This
progress has been mainly achieved due to currently operating instruments:
Imaging Atmospheric Cherenkov Telescopes, Surface Array and Water Cherenkov
detectors. Moreover, we are at the brink of a next generation of instruments,
with a considerable leap of performance parameters. This review summarises the
current status of the TeV astronomy instrumentation, mainly focusing on the
comparison of the different types of instruments and analysis challenges, as
well as provides an outlook into the future installations. The capabilities and
limitations of different techniques of observations of TeV gamma rays are
discussed, as well as synergies to other bands and messengers.
