[منتظر النايف]

Wow! There are so many of what you have listed that I didn't know what they stand for in spite of the fact that I use them or read them in email or chat rooms. I know now what each stands for. Thank you for this piece of invaluable information.

I can ad the following, which you perhaps know as well:

asap: as soon as possible -: فورا قدر المستطاع أو في أسرع وقت ممكن

N.B.: Special attention please. It is an abbreviation of the latin expression nota bene meaning note well. و تعني لاحظ جيدا أو يرجى الإنتباه جيدا

More of these will be added soon.