> As of August 8, 2017, the length limit for tags went from 25 characters to 35 characters. So now is a great time to allow inconveniently compressed tag names to stretch out a bit... Perhaps we could collect here list of tags which now, after the character limit for length of tag name has been extended, could be spelled in full instead of a shortening. (This answer is CW - feel free to edit in here various tags that are currently shortened.) Among possible suspects are the tags with name of length 25 - they can be found by this SEDE query: [Tags with given length of name](http://data.stackexchange.com/mathoverflow/query/708452/tags-with-given-length-of-name?length=25). (However, not all shortened tags use exactly 25 characters. Two examples are [tag:computational-group-theo] or [tag:infinite-dim-manifolds].) **Shortenings to be expanded** * [tag:gch] vs. [tag:generalized-continuum-hypothesis] (Both names should be kept here with a synonym in one or the other direction. After all, people around here know what GCH is, so it probably can remain the master tag. But adding a synonym might be useful addition, since people looking for the tag corresponding to their might start to write something liked "continuum hypothesis" in the tag field.) * [tag:dg-categories] $\to$ [tag:differential-graded-categories] (Maybe the shortened name could be kept as synonyms - since MO users are probably used to it by now?) **Shortening which moderators already replaced** * [tag:stochastic-diff-equations] $\to$ [tag:stochastic-differential-equations] * [tag:supercuspidal-repr] $\to$ [tag:supercuspidal-representations] * [tag:cartesian-closed] $\to$ [tag:cartesian-closed-categories] * [tag:classical-invariant-theor] $\to$ [tag:classical-invariant-theory] * [tag:combinatorial-group-theor] $\to$ [tag:combinatorial-group-theory] * [tag:combinatorial-hopf-algebr] $\to$ [tag:combinatorial-hopf-algebras] * [tag:combinatorial-number-theo] $\to$ [tag:combinatorial-number-theory] * [tag:combinatorial-optimizatio] $\to$ [tag:combinatorial-optimization] * [tag:computational-group-theo] $\to$ [tag:computational-group-theory] * [tag:computational-number-theo] $\to$ [tag:computational-number-theory] * [tag:derived-algebraic-geometr] $\to$ [tag:derived-algebraic-geometry] * [tag:differential-galois-theor] $\to$ [tag:differential-galois-theory] * [tag:differential-graded-lie-a] $\to$ [tag:differential-graded-lie-algebras] * [tag:infinite-dim-manifolds] $\to$ [tag:infinite-dimensional-manifolds] * [tag:infinite-time-computabili] $\to$ [tag:infinite-time-computability] * [tag:modular-rep-theory] $\to$ [tag:modular-representation-theory] * [tag:multiplicative-number-the] $\to$ [tag:multiplicative-number-theory] * [tag:probabilistic-number-theo] $\to$ [tag:probabilistic-number-theory] * [tag:pseudo-differential-opera] $\to$ [tag:pseudo-differential-operators] * [tag:symmetric-monoidal-catego] $\to$ [tag:symmetric-monoidal-categories] * [tag:transcend.-number-theory] $\to$ [tag:transcendental-number-theory]<sup>1</sup> **Synonyms with names longer than 25 characters** * [tag:differential-graded-algebras] $\to$ [tag:dg-algebras] * [tag:topological-quantum-field-theory] $\to$ [tag:tqft] * [tag:unique-factorization-domains] $\to$ [tag:ufds] <sup>1</sup>There is a separate discussion whether there could be a better name for this tag: [The tags (transcendence) and (transcendental-number-theory)](https://meta.mathoverflow.net/q/3044).