What is the abbreviation for packet?

There isn't a universally recognized abbreviation for "packet." However, depending on the context, you could use:

* Pkt: This is a common abbreviation used in networking and computer science.

* Pkg: This is another common abbreviation, especially in the context of software packages.

* Pck: This is less common but can be used in some cases.

It's always best to use the abbreviation that is most common in your specific context or to clarify what you mean if it's not immediately obvious.