What does IMSS stand for?

What does IMSS mean?

IMSS	Italtel Multi Service Solutions Business » Firms
IMSS	International Marketing Support Scheme Business » International Business
IMSS	Internet and Management Support for Storage Internet
IMSS	Institut Municipal de Serveis Socials Governmental » State & Local
IMSS	Instituto Mexicano del Seguro Social International » Mexican
IMSS	International Mass Spectrometry Society Business » Professional Organizations
IMSS	Interscan Messaging Security Suite Computing » Security
IMSS	Inter-Movement Support System Governmental » Transportation
IMSS	Information Management System for Scholars Academic & Science » Universities