What is the full form of sae in writing world?

SAE doesn't have a specific full form related to the writing world. It's possible you're thinking of a different acronym or abbreviation.

Could you provide more context or information?

For example:

* Where did you see this acronym? (A book, website, etc.)

* What was the topic being discussed? (Writing, editing, publishing, etc.)

Knowing more about the situation will help me determine the correct full form.