Here are some possible options, depending on the context:
* Hold: This is the most common and straightforward abbreviation.
* Hld: This is a shorter version, often used in financial contexts.
* On hold: This abbreviation is used to indicate that something is being paused or delayed.
* Hldg: This abbreviation is sometimes used in financial reports, but it's less common than "Hold" or "Hld."
Ultimately, the best abbreviation for "holding" depends on the specific situation and the audience you're communicating with. It's always best to clarify the abbreviation if there is any chance of confusion.