| Rank | Abbreviation | Meaning |
|---|
| ***** | ACNU / UNAC | Association Canadienne pour les Nations Unies / United Nations Association in Canada
| |
| ***** | ACNU | 1-(4-amino-2-methyl-5-pyrimidinyl)methyl-3-(2-chloroethyl)-3-nitrosourea
| |
| **** | ACNU | Asociación Cubana de las Naciones Unidas
| |
| **** | ACNU | Association Canadienne pour les Nations Unies
| |
| **** | ACNU | Australian Council for New Urbanism
| |
| **** | ACNU | anticancer drugs, cisplatin, nimustine
| |
| **** | ACNU | All Ceylon Nurses Union
| |
| **** | ACNU | Arabinoside, Carboquone, Nimustine Hydrochloride
| |
| *** | ACNU | AKZO Chemie, B V
| |