| Acronym | Meaning |
 | HSPH | Harvard School Of Public Health |
| LMS | London Mathematical Society - London |
| ATN | Dronning Maud Land (ISO 3166 Trigram; Merged With AQ In 1983) |
| HIT | Head Injection Technology |
| ARAG | Advanced Research And Assessment Group |
| CA | California (postal Symbol) - Canada (FIPS 10-4 Country Code; ISO 3166 Digram) - Catalonia -Civil Affairs - Close Armour - Computer Associates - Counter-Air |
| PNP | Partido Nuevo Progresista - Plug 'N' Play/Pray - Positive Negative Positive |
| YM | Yemen (FIPS 10-4 Country Code) -Your Magazine (originally Young Miss |
| LIFO | Last In |
| YTS | Youth Training Scheme |
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