| Acronym | Meaning |
| ACHT | Average Call Hold Time |
| TEETH | Tried Everything Else |
| BE | Belgium (FIPS 10-4 Country Code; ISO 3166 Digram) |
| ATGM | Anti-Tank Guided Missile |
| SSDD | Same Shit |
| SONAR | SOund Navigation And Ranging |
| DH | Dear Husband (increasingly Prevalent On Social Mailing Lists |
| RDDL | Resource Directory Description Language (riddle) |
| DADVSI | Loi Sur Le Droit D?auteur Et Les Droits Voisins Dans La Soci?t? De L?information (French |
| DRAGN | Double Radio Source Active Galactic Nucleus (dragon) |