Кто нибудь знает такой вид прощания в письмах. Что означает?

[5674]

Что означает? Какие еще сокращения бывают?
Спасибо

So long,
N

[lark]

Пока
Н
so long spoken especially American English goodbye

[Анна Ф]

"пока"

[tumanov]

это больше в песнях :0)
...
You didnt have to send me flowers like you did today, ah-ha-ha
I wouldnt keep a thing from you, I gave them all away, ah-ha-ha
The girls might fall for everything youve got
But Im not one of them, you know Im not
You wont have me tonight
All right, all right, all right, all right

So long, see you honey
You cant buy me with your money
Chasing, dazing, driving me crazy
But Ill never be your girl
So long, see you honey
You cant buy me with your money
You know its not worth trying
So long, so long, so long

So long, see you honey
You cant buy me with your money
You know its not worth trying
So long, so long, so long
So long, so long, so long
So long, so long, so long