18 August 2017 update: This has now been implemented.
TL;DR I propose the following
There is some discussion on the topic at meta.SE: see Are abbreviations or full words preferred for tag names? The points raised therein by Gilles are essentially:
- acronyms can be ambiguous
- the master tag should be the most readable version
I don't feel like any of these acronyms are ambiguous. However, since the acronym DSC is not particularly well-known, I would recommend expanding the tag dsc, and also creating the relevant tag synonyms.
For nmr, I don't believe that any chemist would search for nuclear-magnetic-resonance
over nmr
. I think that this is one of the rare cases where the acronym is more recognisable at first glance than the full name. However, in line with our previous change to IR spectroscopy, I'd also suggest that we expand this to nmr-spectroscopy.
epr is a borderline case, and I think going down either path is logical: therefore either electron-paramagnetic-resonance or epr-spectroscopy would make sense to me. Does anybody have a preference for either? Since this isn't exactly a huge, pressing issue, maybe we could just run a simple straw poll in the comments.
If you have another suggestion, please drop it in the comments or another answer!