TLA /ˌtiː el ˈeɪ/ noun [countable]
(three-letter acronym) the first letters of the words in a three-word phrase, for example BTW (‘by the way’) or IMO (‘in my opinion’), used as a short form, especially on the Internet and in emails

[TahlilGaran] Dictionary of Contemporary English ▲

TLA
Talk, Listen, Act (United Parcel Service training) 
Three Letter Abbreviation 
Three Letter Acronym 
True Love Always

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲