  We present the results of 4 simultaneous observations of Cygnus X-1 by Ginga
and OSSE. The X-ray/gamma-ray spectra can be described by an intrinsic
continuum and a component due to Compton reflection including an iron K-alpha
line. The intrinsic spectrum at X-ray energies is a power-law with a photon
spectral index of Gamma=1.6. The intrinsic gamma-ray spectrum can be
phenomenologically described by either a power-law without cutoff up to 150
keV, and an exponential cutoff above that energy, or by an exponentially cutoff
power law and a second hard component.
