What is the crossword answer for the clue: Memo abbreviation

FYI - a 3 letter word may be the answer you are looking for!

ASAP - a 4 letter word may be the answer you are looking for!

ATTN - a 4 letter word may be the answer you are looking for!

INRE - a 4 letter word may be the answer you are looking for!

Memo abbreviation

3 Character Answers:

FYI

4 Character Answers:

ASAP

ATTN

INRE