A three-letter acronym, three-letter abbreviation, or TLA is an abbreviation, specifically an acronym, alphabetism, or initialism, consisting of three letters. These are usually the initial letters of the words of the phrase abbreviated, and are written in capital letters (upper case); three-letter abbreviations such as etc. and Mrs. are not three-letter acronyms.

Most three-letter abbreviations are initialisms: all the letters are pronounced as the names of letters, as in APA /ˌeɪpiːˈeɪ/AY-pee-AY. Very few fit the strict definition of acronym, which requires the abbreviation to be pronounced as a single word, as in DOS /ˈdɒs/DOSS. When TLA stands for three-letter abbreviation, then TLA has the self-referential feature that TLA is its own TLA (and is thus autological). When TLA stands for three-letter acronym, this feature does not apply (as it is an abbreviation but not an acronym).

The exact phrase three-letter acronym appeared in the literature in 1975. Three-letter acronyms were used as mnemonics in biological sciences, and their practical advantage was promoted by Weber in 1982. They are used in many other fields, but the term TLA is particularly associated with computing. The specific generation of three-letter acronyms in computing was mentioned in a JPL report of 1982.

Scott Matthew Bloom (born July 28, 1973) is an American actor and film producer.

Bloom was born in Merrick, New York. He began acting in film and television at a young age, starring in the cult horror film The Stuff (1985) and subsequently appeared in numerous TV serials and TV movies including the role of Jesse Nash in the popular sitcom Who's the Boss? from 1987 to 1988.

Scott's movie credits as an actor include roles in Don's Plum (2001) with Leonardo Dicaprio and Tobey Maguire, John Q (2002) with Denzel Washington and Robert Duvall, and Smokin' Aces (2006) with Ray Liotta, Ryan Reynolds, and Jeremy Piven.

Partnered with Giovanni Agnelli and Manny Mashouf, Scott founded the production company Argonaut Pictures in 2007. The company is currently in production on the film Welcome to the Rileys, starring Kristen Stewart, James Gandolfini, and Melissa Leo. The project is also being produced by Ridley Scott and Scott Free Productions, and is being directed by Jake Scott.

Scott is also slated to executive produce The Untitled Twilight Zone Project for Warner Bros. (inspired by the hit television series created by Rod Serling) along with the aforementioned Dicaprio and his production shingle Appian Way.