PS is a little extra note you add after you have already finished a letter. You have signed your name — then one more thing comes to mind, so you write PS and the new sentence. It is short for postscript. The idea is “after the writing.” People still do this on paper, and they do it in emails and phone messages too: a last thought that did not fit the main body.

PSPS is a little extra note是一個小小的附加note，you add after you have already finished a letter是你已經寫完信之後又加上去的。You你 have signed your name已經簽好名字了——then再 one more thing comes to mind又想到一件事，so所以 you write PS你就寫上 PS，and和 the new sentence新加的那句話。It它 is short for postscript是 postscript 的簡寫。The idea這個概念 is "after the writing."是「寫完之後」。People人們 still do this on paper現在還是會在紙上這樣做，and而 they do it in emails and phone messages too在email和手機訊息裡也會這樣做：a last thought最後想到的一件事，that did not fit the main body沒放進主要內容裡的。

If a second extra thought arrives, some people write PPS, a half-joking second postscript. The tone is ordinary, even warm — a PS is often the human bit, a reminder, an “I forgot.” You may see it with dots (P.S.) or without (PS); both are fine.

If a second extra thought arrives如果又冒出第二個額外的想法，some people有些人 write PPS會寫 PPS，a half-joking second postscript一個帶點玩笑意味的「第二次附言」。The tone語氣 is ordinary, even warm很平常，甚至帶點溫暖——a PS一個 PS is often the human bit常常是最有人情味的部分，a reminder一個提醒，an "I forgot."一句「我忘了」。You你 may see it with dots (P.S.) or without (PS)可能會看到加句點的 (P.S.) 或不加的 (PS)；both are fine兩種都可以。

Though actually, those two letters do other jobs in English. On a games box, PS is PlayStation. This entry is the letter one.

Though actually不過其實，those two letters這兩個字母 do other jobs in English在英文裡還有別的用法。On a games box在遊戲主機盒上，PSPS is PlayStation指的是 PlayStation。This entry這個條目 is the letter one講的是「又及」這個意思。

In Taiwan, people often just write PS in a Chinese message; they have borrowed the letters as they are.

In Taiwan在台灣，people人們 often just write PS in a Chinese message常常會直接在中文訊息裡寫 PS；they他們 have borrowed the letters as they are就是直接把這兩個字母借過來用。