I have been researching the meaning of P.S. Firstly is it P.S without a full stop at the end? or P.S. with a full stop at the end? secondly I have looked it up this is what I found: The questions I am bringing to your attentions are these Is P.S. a valid connotation and how useful is it to be used? for example: should it be skipped all together because none of the reasons highlighted for it to be used cannot be proven to be true. Like here ''hastily or accidently'' means that one wrote the P.S without being aware they did. and if one wrote a letter to you then at the bottom added: P.S. I love you How would you feel about this?