However, other abbreviations can be used depending on the context, such as:
* "S." (for singular)
* "Schls." (for plural)
* "HS." (for high school)
* "ES." (for elementary school)
* "MS." (for middle school)
* "U." (for university)
It's important to use the abbreviation that is most appropriate for the situation and make sure the meaning is clear.