Btw: By the way, by the way;

ASAP: as soon as possible;

LMK: Let me know, let me know;

B4: Before,

BAK: Go back to the keyboard, come back;

Bbl: Come back later, come back later;

BCNU: Seeing you, observing you;

BRB: Be right back, be right back;

CU: See you later. Farewell.

Extended data:

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English mail mainly needs to pay attention to the subject, title, body, ending and signature. Also need to pay attention to the text, must use written language; Don't use exclamation marks at the end of sentences easily, pay attention to the use of punctuation marks; Write zhidao's complete text and signature; The name is your English name. The following is a detailed introduction:

1, the subject refers to the need to give the email a simple, clear and specific title, so that the recipient can know the basic content of the email at a glance;

2. It is suggested to take the surname of Dear+ as the destination. There is more than one recipient, so you can use a dear customer or a dear partner.

In the body part, first of all, we need some pleasantries as a supplement to our previous conversation ...; As discussed on the phone ... Thank you for your kind reply, etc.

4. The last is the ending. The writer writes polite words in the lower right corner or the lower left corner of the letter, such as sincerely yours and truly yours.

5. Finally, sign your name at the end of the letter, fill in the polite words and attach your contact information or address.