  We present a collection of 450 598 eclipsing and ellipsoidal binary systems
detected in the OGLE fields toward the Galactic bulge. The collection consists
of binary systems of all types: detached, semi-detached, and contact eclipsing
binaries, RS CVn stars, cataclysmic variables, HW Vir binaries, double periodic
variables, and even planetary transits. For all stars we provide the I- and
V-band time-series photometry obtained during the OGLE-II, OGLE-III, and
OGLE-IV surveys. We discuss methods used to identify binary systems in the OGLE
data and present several objects of particular interest.
