I think it should be a master of science, a master of college. Full-time graduate students are masters of science, that is to say, regular full-time graduate students have diplomas and master's degree certificates. Professional masters are on-the-job graduate students, and generally only have a degree certificate. Because the study time at school is too short, usually only six months to one year, most of them do not have a diploma. Such as master of law, master of education, master of public administration, master of engineering and so on. The degrees of full-time graduate students are generally master of law, master of engineering, master of literature, master of science and so on. As can be seen from the name, professional master is more important than practice, and it is suitable for those who have already served to continue their studies in their own fields. Full-time Master of Science focuses more on theoretical research. I don't know if I explained it clearly.