How to know difference between PGDBM,PGDM & MBA?

PGDBM means Post Graduate Diploma in Business Management, PGDM stands for Post Graduate Diploma in Management and MBA stand for Master in Business Administration. MBA is a degree that is affiliated to a recognized university. PGDM or PGDMM is diploma approved by AICTE, but university is not concerned with these programs. AICTE approved B-School's conduct their examination and a scope of manipulation is always there. In MBA there is no scope for any manipulation as the affiliating university has complete authority over it. PGDBM is an autonomous course, neither recognized by university nor by AICTE. These institutions devise their own curriculum: they conduct the examination and offer their own degree. After pursuing the kind of autonomous program no one can pursue higher education like Ph.D etc.