  This article reports world averages for measurements on b-hadron properties
obtained by the Heavy Flavor Averaging Group (HFAG) using the available results
as of winter 2005 conferences. In the averaging, the input parameters used in
the various analyses are adjusted (rescaled) to common values, and all known
correlations are taken into account. The averages include lifetimes, neutral
meson mixing parameters, semileptonic decay parameters, rare decay branching
fractions, and CP violation measurements.
