  The INTEGRAL archive developed at INAF-IASF Milano with the available public
observations from late 2002 to 2016 is investigated to extract the X-ray
properties of 58 High Mass X-ray Binaries (HMXBs). This sample consists of
sources hosting either a Be star (Be/XRBs) or an early-type supergiant
companion (SgHMXBs), including the Supergiant Fast X-ray Transients (SFXTs).
INTEGRAL light curves (sampled at 2 ks) are used to build their hard X-ray
luminosity distributions, returning the source duty cycles, the range of
variability of the X-ray luminosity and the time spent in each luminosity
state. The phenomenology observed with INTEGRAL, together with the source
variability at soft X-rays taken from the literature, allows us to obtain a
quantitative overview of the main sub-classes of massive binaries in accretion
(Be/XRBs, SgHMXBs and SFXTs). Although some criteria can be derived to
distinguish them, some SgHMXBs exist with intermediate properties, bridging
together persistent SgHMXBs and SFXTs.

High Energy Astrophysical Phenomena;Solar and Stellar Astrophysics