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. (However, not all shortened tags use exactly 25 characters. Two examples are computational-group-theo or infinite-dim-manifolds.)
Shortenings to be expanded
- gch vs. 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.)
Shortening which moderators already replaced
- classical-invariant-theor $\to$ classical-invariant-theory
- derived-algebraic-geometr $\to$ derived-algebraic-geometry
- modular-rep-theory $\to$ modular-representation-theory
- multiplicative-number-the $\to$ multiplicative-number-theory
- probabilistic-number-theo $\to$ probabilistic-number-theory
- pseudo-differential-opera $\to$ pseudo-differential-operators
- combinatorial-group-theor $\to$ combinatorial-group-theory
- combinatorial-number-theo $\to$ combinatorial-number-theory
- combinatorial-optimizatio $\to$ combinatorial-optimization
- computational-group-theo $\to$ computational-group-theory
- computational-number-theo $\to$ computational-number-theory
- differential-galois-theor $\to$ differential-galois-theory
- infinite-dim-manifolds $\to$ infinite-dimensional-manifolds
- symmetric-monoidal-catego $\to$ symmetric-monoidal-categories
- transcend.-number-theory $\to$ transcendental-number-theory1
1There is a separate discussion whether there could be a better name for this tag: The tags (transcendence) and (transcendental-number-theory).