Which application form should I use to apply to DIU?

It depends on what level of courses and how many courses you intend to take. Generally, applicants are encouraged to apply for the highest level admission status for which they qualify. If you only want to take a few courses, Gateway admission allows you to take up to 10 credits at DIU. Graduate admission allows you to take an unlimited number of either undergraduate or graduate credits. Undergraduate admission allows you to take an unlimited number of undergraduate credits and also allows you to petition to take up to 9 credits of graduate-level courses.