An RAE cannot be directly converted into an IU without knowing the source(s) of vitamin A. For example, the RDA of 900 mcg RAE for adolescent and adult men is equivalent to 3,000 IU if the food or supplement source is preformed vitamin A (retinol).
Diploma vs Associate Degree. A Diploma is one type of certification, and an Associate degree is another type. Diploma and Associates degree, as the name specifies, are different in many aspects. There is no confusion between the two, as the difference is very specific. A Diploma can be said to be a document awarded to a student after completion of a course.
Again, it all depends on the college. Another difference is in the scope of study - a bachelor's degree tends to cover a broad range of topics under a certain field, whereas a master's degree concentrates on narrower subjects. The concepts taught in a master's degree are also more advanced than a bachelor's degree. The third difference lies in the earning potential of the two degrees.