Contact binaries in OGLE-1 database

We present a new catalog of 1575 contact binary stars fainter than I=18 mag identified in OGLE-I database in the selected directions toward the Galact ic bulge and the Galactic bar. For completeness we recall here also the obj ects from the formerly published OGLE catalog of contact binaries brighter than I=18 mag. To ease the comparison and/or distinction between contact binaries with sin usoidal light curves and pulsating stars we also give a catalog of 509 obje cts with nearly sinusoidal light curves which were classified or re-classif ied as pulsating variable stars. Present catalog contains the most numerous, observationally homogeneous sam ple of contact binaries. Given are the statistical properties of the sample relating to the distributions of brightness, periods and amplitudes of the contact binaries.