As I understand it (explained to me once), inquiries about someone's 'Rate or Rating' would also apply if their Service was with another branch & letters or a title, not necessarily just numbers would have been the appropriate response. This is not the same as the E...

Though, I was also told that MOS has become a common vernacular most generally recognize if they were in the Military since/after Vietnam.

Curious if the above info is accurate. Lmk if I have it wrong. Thanks.