常用英文縮寫 FYI、rsvp

tbd

to be determined 待確認

FYI

for your information 供你參考面； 會用大寫）

rsvp

please reply 請回覆

etc.

et cetera …等等

Q&A

questions and answers 

fwd / fw

cc

carbon copy 副本
asap

as soon as possible 盡快；越快越好
ttyl

talk to you later 晚點聊

afk

away from keyboard 不在；不在位子上