What is the abbreviation for different masters?

There isn't a single, universally accepted abbreviation for "different masters." The best abbreviation would depend on the context. For example:

* If referring to multiple masters in a hierarchical structure (e.g., in a business): You might use something like Diff. Masters or Mult. Masters.

* If referring to different masters in a historical or metaphorical sense: You might need a more descriptive phrase and an abbreviation wouldn't be practical.

* In an academic context, referring to multiple Master's degrees: You might see something like M.A.s (for Master of Arts degrees) or similar depending on the specific degree types.

In short, there's no standard abbreviation. Clarity is key; choose a phrasing and potential abbreviation that's clear within its context.