WMS

WMS means:

Middle school for business professions , a type of school in Austria
Web map service in the field of geospatial
Website management system in the field of Internet and programs
Business middle school
Warehouse Management System , a system for warehouse management
Knowledge management system
Width measuring system for shoes, see shoe size
Wechsler Memory Scale , a psychological test procedure
White male system , a feminist battle term from the 1970s that is used as a synonym for patriarchy
a workflow management system

WMS as a distinguishing mark on license plates: