Add more postscripts by adding a 'P' to “PS.” The “post” in “postscript” means 'after' in Latin (and “script” means 'writing'), and so when you add another 'P' to a “PS,” you're writing an “after-after-writing.” PPS (and PPPs and PPPPS) is best used in informal correspondence to add a little bit of humor or cheekiness.
PS is widely used in letters and electronic communication like emails, text messages, instant messages, and social media. Although the punctuation of PS varies, it should always be capitalized. Make sure to punctuate it consistently in all your correspondence.
PS | Business English written abbreviation for postscript: used at the end of a letter or email after you have signed your name to show that you are adding a short remark or message not included in the main part: PS: Thanks for your help with the recent project.
Ing to the Cambridge Dictionary, the correct American format is 'P.S.' with periods after each letter. In contrast, the Chicago Manual of Style advocates PS without periods.