2715 20160701171709.0 ASTROimport-872 Bakis, V. 2015 Study of Eclipsing Binary and Multiple Systems in OB Associations III: A Progress Report Our international collaboration is devoted to the observation and analysis of young eclipsing binary and multiple systems in various OB associations. Preliminary results reveal several higher-multiplicity systems. Modern analysis techniques such as spectral disentangling and comprehensive atmosphere modeling enable us to derive the atmospheric properties of the distant companions as well as the astrophysical parameters of the eclipsing binary components with high accuracy. Hensberge, H. Demircan, O. Zejda, M. Bilir, S. Nitschelm, C. Living Together: Planets, Host Stars and Binaries 496 2015 189 http://esoads.eso.org/abs/2015ASPC..496..189B published in NONREF