tvtb – expression of love/friendship. It stands for Ti Voglio Tanto Bene

klm – Royal Dutch Airline

btw – by the way

brb – be right back

xd can mean ex-dividend, in relation to shares.

TVTB Ti Voglio Tanto Bene

KLM Kaiserliche Marine (Enigma: Rising Tide game)

KLM Keady Livestock Market

KLM Kernel Lock Manager

KLM Kerr Lens Modelocking

KLM Keyboard Layout Manager

KLM Keystroke-Level Model

KLM Kirkvaag, Lystad, Mjøen (Norwegian comedy group)

KLM Klub Langer Menschen (German: Tall Person Club)

KLM Koninklijke Luchtvaart Maatschappij (Royal Dutch Airlines)

KLM Krutov, Larionov, Makarov (hockey offensive linemen)

KLM Royal Dutch Airlines, Netherlands (ICAO code)

see also – http://acronyms.thefreedictionary.com

tvtb=don’t know

klm=don’t know

btw=by the way

brb=be right back