1) American young adult novel 2) bye 4 now 3) Closing letters 4) IM sign-off 5) lol, peace 6) Message sent before going AFK 7) Modern farewell letters 8) Quick goodbye 9) Talk to you later 10) Text messaging sign-off 11) Texting farewell 12) Texting sign-off 13) Texting ta-ta 1) Bye 
Talk to you later
Talk To You Later -or- Type To You Later
talk to you later