Semester units versus credit hours
&quot;Semester units&quot; are up to the definition of the school. Some people call a &quot;unit&quot; one course; some people call a &quot;unit&quot; a fraction of a course.
For example, just among the US schools that I have been affiliated with (or visited for an extended period of time):

Yale: 1 semester course = 1 unit
Harvard: 1 semester course = 1/2 unit
Princeton: 1 semester course = 1 unit
MIT: 1 semester course = 9 or 12 units
UConn: 1 semester course = 3 or 4 &quot;credit hours&quot;

So you definitely need to consult the individual school catalog to see what system they're using.