MBS may stand for:
Mainichi Broadcasting System, television and radio broadcaster in Osaka, Japan
Manchester Business School, Business school at the University of Manchester (UK)
Marine Biology Simulation, a case study developed in the Advanced Placement Computer Science A and AB courses
Maritime Broadcasting System, a broadcasting corporation in the three Atlantic provinces, Nova Scotia, New Brunswick, and PEI
MBS, a hip hop artist
MBS International Airport, the airport that serves Midland, Bay City, and Saginaw, Michigan
Medal for Bravery , an honour in Hong Kong
Melbourne Business School, associated with the University of Melbourne, Australia
Mercey Brothers Sound, a defunct recording label
Mohan Bikram Singh, a Nepalese communist leader
Montafonerbahn Schruns, a railway company in Austria
Mortgage-backed security, a bond backed by mortgage payments
Mutual Broadcasting System, a defunct American radio network
Micro Bill Systems, a Trojan horse piece of malware that em
Source:
http://en.wikipedia.org/wiki/MBS