Going through the suggested edits review queue, I stumbled over a tag-wiki edit to modern-analysis. Since I had never seen that tag before, I had a look, and it was just created with one single question tagged (not by the OP).
The suggested tag wiki excerpt reads
For a questions of common foundation in general topology and calculus in normed vector spaces.
and the suggested tag wiki reads
Modern mathematical analysis is the study of infinite processes. It is the branch of mathematics that includes calculus. It can be applied in the study of classical concepts of mathematics, such as real numbers, complex variables, trigonometric functions, and algorithms, or of non-classical concepts like constructivism, harmonics, infinity, and vectors.
Do we really need this tag? (Where and when is the differerence between, say, modern-analysis or real-analysis/functional-analysis, etc?)