| SADD | Students Against Drunk Driving |
| HONS | Head of New Students [engl.] |
| ISHA | International Students of History Association |
| SPES | Special Program for Employment of Students |
| BESA | Biomedical Engineering Students Association |
| IAESTE | International Association for the Exchange of Students for Technical Experience Bonn, http://www.iaeste.de |
| COSAC | Conference of Community and European Affairs Committees of Parliaments of the European Union Konferenz der Europaausschüsse der nationalen Parlamente |
| IE | Indo-European |
| ESO | European Society |
| EV | European Videotelephony |
| NET | Next European Torus |
| NET | Next European Torus Kernfusionsprojekt |
| EBONE | European backBONE |
| EBONE | European Backbone |
| EIB | European Installation Bus |
| EPO | European Pet Organization Amersfoort, [NL], http://www.eponet.org |
| SEA | Single European Act |
| EUREX | European Exchange |
| EC | European Community Europäische Gemeinschaft |
| TEL | The European Library Den Haag, http://www.theeuropeanlibrary.org |
| PEP | Pan European Paging |
| ECB | European Central Bank Europäische Zentralbank, Frankfurt/ M., http://www.ecb.int/ecb/html/index.de.html |
| ECM | European Common Market |
| ESO | European Southern Observatory Garching, http://www.eso.org |
| ESN | European Skywarn Network vgl. Osnabrück, http://www.skywarn.de |
| ESO | European School of Oncology |
| ESN | European Society of Neurochemistry http://www.biokemia.sote.hu/ESN/esn.html |
| ESN | European Society of Nematologists vgl. http://esn.boku.ac.at |
| EJIL | European Journal of International Law Zeitschrift |
| ECS | European Chemical Society |
| ECB | European Chemicals Bureau |
| ESO | European Sources Online |
| ECC | European Communication Council |
| ERO | European Radiocommunications Office |
| EMS | European Meteorological Society |
| ELC | European Language Council [see CEL/ELC] |
| ECE | European Commission for Europe Berlin/ München/ Bonn, http://www.eu-kommission.de |
| ESO | European Space Organization |
| ESO | European Society for Oceanists heute: ESfO |
| ESO | European Standards Organization |
| ESP | European Schools Project |
| ECS | European Common Standard |
| ECS | European Communications Satellite |
| EFA | European Film Academy |
| EFC | European Foundation Centre Brüssel, http://www.efc.be |
| EMI | European Monetary Institute |
| ESC | European Society of Cardiology |
| EFS | European Federation of Sexology vgl.http://www.europeansexology.com |
| ENS | European Nuclear Society |
| EHQ | European History Quarterly Zeitschrift |