| Acronym | Meaning |
 | TUI | Text User Interface (cf. CLI) |
| REU | R?union (ISO 3166 Trigram) |
| LISA | Laser Interferometer Space Antenna |
| CMM | Capability Maturity Model |
| SY | Syria (ISO 3166 And FIPS 10-4 Country Code Digram) |
| CCII | Command And Control Information Infrastructure |
| BZP | Benzylpiperazine |
| SUD | Subject Under Discussion |
| DPKO | UN Department For Peacekeeping Operations |
| EFL | English As A Foreign Language |
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