| Acronym | Meaning |
| DTI | UK Department Of Trade And Industry |
| BFA | Burkina Faso (ISO 3166 Trigram) |
| PDA | Personal Digital Assistant - Predicted Drift Angle - Public Display Of Affection - Push-Down Automaton |
| ARM | Anti-Radiation Missile -Armenia (ISO 3166 Trigram) |
| PT | Petatesla -Physical Training (in The Army) -Portugal (ISO 3166 Digram) |
| NPC | National Postgraduate Committee - National Provincial Championship (New Zealand Rugby Competition) - Navigation Planning Chart - Non-Player Character (role-playing Games) |
| IJN | Imperial Japanese Navy (World War II) |
| IMF | International Monetary Fund |
| PTUI | Plain-Text User Interface (pa-too-ey) (cf CLI) |
| NF | Norfolk Island (ISO 3166 Digram) |