What's the shortest abbreviation for "see attachment" or "see enclosed file" in an e-mail?

I guess this term came in recently.

PFA - Please Find Attached.

Acronym Finder

There isn't any abbreviation that I'm aware of. But there should be, and perhaps will be.

Cc: (carbon copy) and Bcc: (blind carbon copy) are used to indicate a comparable type of meta info about a letter or email. In fact, they literally refer to a communication technology that is no longer in widespread use, but the actual function they refer to (sending to multiple recipients) is very much alive. Having a quick way to indicate an email attachment only makes sense. Off the top of my head, and using a similar format, how about Att: followed by a number: Att:1. Or by the file type(s): Att:jpg/zip.