| NASA | National Aeronautics and Space Administration |
| CAA | Civil Aeronautics Administration Heute: FAA |
| CLASP | Computer Language for Aeronautics and Space Programming |
| NACA | National Advisory Committee on Aeronautics Heute: NASA |
| NTIA | National Telecommunications and Information Administration Washington, DC, http://www.ntia.doc.gov |
| NOAA | National Oceanic and Atmospheric Administration Washington, DC, http://www.noaa.gov |
| NOAA | National Oceanic and Atmospheric Administration |
| NSSDC | National Space Science Data Center |
| CAB | Civil Aeronautics Board Heute: FAA |
| ETMA | Efficient Turbulence Models for Aeronautics |
| RTCA | Radio Technical Commission for Aeronautics |
| EREA | Association of European Research Establishments in Aeronautics Köln, http://www.erea.org |
| aiaa | American Institute of Aeronautics and Astronautics [engl.] |
| TSST | Time-Space-Space-Time network |
| LA | Licensing Administration |
| ZAW | Zero Administration Windows |
| VA | Veterans Administration |
| ZAC | Zero Administration Client |
| ZAI | Zero Administration Initiative |
| ZAK | Zero Administration Kit [Microsoft] |
| CSA | Customer Service Administration |
| TSA | Transportation Security Administration |
| SWAT | Samba Web Administration Tool |
| FAA | Flight and Avionic Administration |
| FAA | Federal Aviation Administration [U.S.] Washington, DC, http://www.faa.gov |
| SBA | Small Business Administration |
| NAS | Netnews Administration System |
| FHA | Federal Housing Administration |
| DCA | Data Center Administration |
| EAS | Engineering Administration System |
| MAAP | Maintenance And Administration Panel |
| MAT | Maintenance and Administration Terminal |
| M.P.A. | Master of Public Administration Akademischer Grad |
| NAC | Network Administration Center |
| MBA | Master of Business Administration |
| OAM | Operation, Administration, Maintenance |
| PAR | Public Administration Review Fachzeitschrift |
| CAO | Computer Aided Administration and Organization |
| CMAC | Centralized Maintenance and Administration Center |
| LISA | Large Installation System Administration |
| D.B.A. | Doctor of Business Administration [engl.] Akademischer Titel für Wirtschaft und Verwaltung |
| OSHA | Occupational Safety and Health Administration Washington, DC, http://www.osha.gov |
| ONAC | Operations Network Administration Center |
| RMAS | Remote Memory Administration System |
| HCFA | Health Care Financing Administration |
| GSA | General Services Administration [U.S. Government] |
| FDA | Food and Drug Administration [U.S. Government] |
| BPA | Bonville Power Administration [engl.] Amerikanischer Energieversorger in Portland, Oregon |
| B.B.A. | Bachelor of Business Administration [engl.] Akademischer Titel |
| AMT | Administration and Maintenance Terminal [engl.] |