This post is primarily to get a consensus on appropriate tag name conventions. Signal processing is a very diverse field and not everyone might be familiar with all acronyms (other than basic ones). I see an increasing trend of acronyms for all tags and it could get confusing eventually. Personally, I think descriptive tags are better than acronyms (which should be synonyms). However, we'd also run into tag length issues (e.g., discrete-time-fourier-transform is 26 chars and only 25 are allowed).
So my suggestion is to use a hybrid of partial acronyms and partial descriptive names as in kernel-pca, discrete-time-ft, discrete-ft, continuous-time-ft, etc. when there is one among the group that will overflow and fully descriptive names in other cases as in hidden-markov-model, fourier-transform, cosine-transform