It’s just one of those things that are really common, and you see them every time, maybe sometimes even use it, but you’re not actually sure what it is, you know what I mean? What’s PS in a letter?
Examples:
- PS I love you
- PS Don’t forget to let the cat in before you go to bed.
- PS Please excuse my not mailing this – but, I don’t know your new address.
PS stands for postscript.
It comes from the Latin postscriptum, which literally translates to “written after.” A postscript is an additional thought added to a letter or email (and sometimes other documents) that comes after it has been completed.
In your examples, It shows that PS saved us from having to edit or rewrite an entire letter just to include an important afterthought.
PS stands for postscript, from the Latin postscriptum, which literally means “written after.”
A PS is added to the letters or documents after they’re complete (so, basically, if you forgot to add something, you use PS)
It can be written as “PS” (British English format) or “P.S.” (American English format)
Source:
https://www.grammarly.com/blog/what-does-ps-mean/