关于program缩写的一些疑问

arcxUID：2297904

我又有疑问啦~~但愿不要被bs...
MSc=master of science
MA=master of arts
数学院下面的MSc项目我还是可以理解的，个么，谁能帮我解释一下，数学院下面的MA该怎么解释呢。。？
另外，我今天还看到一个我从没看到过的项目缩写：doctor of arts in mathematical sciences。。。这个缩写，一般又指什么呢？

haohao13911UID：2447889

Doctor of Arts in Mathematical Sciences
The D.A. thesis is not expected to display the sort of original research required for the Ph.D. thesis, but instead to demonstrate an ability to organize, understand, and present mathematical ideas in a scholarly way, usually with sufficient originality and worth to produce publishable work. Whenever practical, the Department provides D.A. candidates the opportunity to use materials developed to teach a course. While the typical Ph.D. recipient will seek a position which has a substantial research component, as at a large university or in an industrial or governmental research laboratory, the D.A. recipient usually will seek a position where research is not central.
好像就是中国的师范类吧:)