| AACO | Assault Airlift Control Officer |
|---|---|
| CORI | Criminal Offender Record Information |
| ERO | European Radiocommunications Office, Európsky rádiokomunikačný úrad (skr.) |
| ILO | International Labour Office (skr.) |
| IRO | Investor Relations Officer (skr.) |
| NLO | National Labor Office (skr.) |
| OIE | Office of International Education (skr.) |
| OIRT | Office of Instructional and Research Technology |
| OMCL | Official Medicines Control Laboratories, Európska sieť pre oficiálne laboratóriá pre kontrolu liečiv (angl.skr.) |
| ONT | Office National du Tourisme (skr.) |