Types of Diabetes

Hi Everyone! I have a question…Lately I have seen some “new types” of diabetes. I know about Type One, and Type Two…what is 1.5, Class C…? Are these different ratings in other countries?
Curious mind wants to know. Thanking you all in advance for your wealth of information!

If you do a search here for Type 1.5 (LADA), there’s a ton of info on this topic & on MODY. They’re not different ratings from different countries. Never heard of Class C.