A Mastère Spécialisé (MS), also called Specialized Master or Advanced Master, is a French degree (created in 1986) that a person gets after completing a Master's degree and then continuing to study in a Grande École in some specific field. These students are considered to possess more advanced knowledge of the field that they study, as compared to those who only get a Master's degree.
The course takes one year to complete, including at least four months of practical internship.