Home > Business > Online Business BM/Sisa.com, a subsidiary of the YBM’s Internet business, makes available online content that YYBM has accumulated over the more than forty years of its existence and that has been fdigitized or e-learning access. With quality content and qualified instructors, YBM/Sisa.com is a leading company in online foreign-language education. This premier position is certified by online ranking services such as Rankey.com and 100 hot, and is buttressed by a series of reports and articles in the media.