* pt - This is the most common abbreviation for pint.
* p - This abbreviation is sometimes used, but it's less common and can be ambiguous.
* pt. - This abbreviation is used less frequently than "pt", but it is still acceptable.
It's important to note that the specific abbreviation used may depend on the context. For example, in a recipe, "pt" is usually preferred, while in a scientific context, "p" might be more common.