What is the Spanish abbreviation for established?

There isn't a direct Spanish abbreviation for "established" in the same way that we have "Est." in English. However, depending on the context, you can use these options:

For legal or business contexts:

* Est. (This abbreviation is used in Spanish, even though it is derived from the English word "established")

* Fund. (from "fundado", meaning founded)

* Cons. (from "constituido", meaning constituted)

For historical contexts:

* Fund. (from "fundado", meaning founded)

* Cread. (from "creado", meaning created)

* Establec. (from "establecido", meaning established)

For other contexts:

* You can use the full word "establecido" if you want to be clear and avoid any ambiguity.

Remember that the best option will depend on the specific context and the audience you are writing for.