Is it safe to assume that all faculty know what a DOI is? Can I refer to DOIs without explaining what they are?  I am writing for an audience of experienced academics.
My suspicion is that the vast majority of academics (in STEM fields, say) will


have seen DOIs being used many times in papers and online,
be able to discern your intent if you use the term DOI in a context other than in print with a URL next to it,
have absolutely no idea what the letters stand for, and
never have done any research (e.g., read the DOI wikipedia article) about what DOI's are, why they're used, etc.


Added: In response to Strongbad's comment, let me summarize the above briefly. I believe that a large majority of academics will have seen DOIs being used and know that if they go to the URL they'll wind up at the paper they're looking for. I also believe that, if pressed, many academics would say that the point of having a DOI is to be able to provide people with a stable URL where the paper may be found. But I think that in most cases the latter response would be a guess because I think that very few academics have spent any time looking into DOIs in any serious way.