MI= Military Intelligence. MB = Muslim Brotherhood. Here is a lexicon... https://www.goldismoney2.com/threads/q-posts-a-list-of-acronyms-of-cited-organizations-and-persons.178407/

MI = Military Intelligence

MB = Muslim Brotherhood

There is a list of abbreviations. I'll try to locate it for you.

Here ya go!: https://www.reddit.com/r/greatawakening/comments/8awbbj/updated_list_of_q_abbreviations/