  This article reports world averages of measurements of $b$-hadron,
$c$-hadron, and $\tau$-lepton properties obtained by the Heavy Flavor Averaging
Group (HFAG) using results available through summer 2014. For the averaging,
common input parameters used in the various analyses are adjusted (rescaled) to
common values, and known correlations are taken into account. The averages
include branching fractions, lifetimes, neutral meson mixing parameters, $CP$
violation parameters, parameters of semileptonic decays and CKM matrix
elements.
