The tag etcs has now 7 occurrences.

It stands for "elementary theory of the category of sets". I suggest to manually change it to elementary-theory-category-sets. (This is 31 letters. elementary-theory-category-of-sets would be 34 letters, is maybe suitable too.)

I believe abbreviations should be avoided in tags (exceptions only being very famous ones such as PDE, ODE).

The tag etcs has now 7 occurrences [edit: had 7 occurrences].

It stands for "elementary theory of the category of sets". I suggest to manually change it to elementary-theory-category-sets. (This is 31 letters. elementary-theory-category-of-sets would be 34 letters, is maybe suitable too.)

I believe abbreviations should be avoided in tags (exceptions only being very famous ones such as PDE, ODE).

Edit: now changed to elementary-theory-category-of-sets.