  This is a collection of notes based on lectures given at IIT Madras in
September 2019 and at IFT Madrid in November 2019. It is supposed to be a
concise (and therefore not comprehensive) and pragmatic course on applied
holography and especially the (basic) analytic and numerical techniques
involved. The lectures are not focused on the large theoretical and fundamental
background which can be found already in several places in the literature, but
rather on concrete applications of Bottom-Up AdS-CFT to Hydrodynamics, QCD and
Condensed Matter. The idea is to accompany the reader step by step through the
various benchmark examples with a classmate attitude, providing details of the
computations and open-source numerical codes in Mathematica, and sharing simple
tricks and warnings collected during my research experience. At the end of this
path, the reader will be in possess of all the fundamental skills and tools to
learn by himself/herself more advanced techniques and to produce independent
and novel research on the topic.
