| Year | Name of Congress | Participants | PCO/DMC |
| since 2005 | EGU - General Assembly & Congress of European Geosciences | 7500 | DMC |
| since 2000 | ÖDG - Annual Congress of the Austrian Society of Diabetes | 1000 | PCO |
| since 1991 | ECR - European Congress of Radiology | 12000 | DMC |
| since 1986 | ÖGIM - Annual Congress of the Austrian Society of Internal Medicine | 1000 | PCO |
| since 1977 | ÖGGG - Annual Congress of the Austrian Society of Gynaecology | 700 | PCO |
| 2007 | EUFOS - 6th European Congress | 4000 | PCO |
| 2007 | EATES - 1st Joint Congress EATES & ETS | 750 | PCO |
| 2007 | AES - CXXII. Audio Engineering Society Convention | 6000 | DMC |
| 2006 | COCHLEAR - IX. International Cochlear Implant Conference | 1700 | PCO |
| 2006 | ICSV - XIII. International Congress on Sound and Vibration | 1500 | PCO |
| 2006 | FENS - 5th Forum of European Neuroscience | 5000 | DMC |
| 2006 | EEA-ESEM - XXI. Annual Congress of the European Economic Association + LXI. European Meeting of the Economatric Society | 1700 | PCO |
| 2005 | WFSBP – VIII. World Congress of Biological Psychiatry | 5000 | PCO |
| 2005 | ICOMS - International Congress of Oral and Maxilofacial surgery | 2000 | DMC |
| 2005 | MNE - International Conference on Micro- and Nano-Engineering | 600 | PCO |
| 2004-1996 | Theodor-Herzl-Symposium | 850 | PCO |
| 2004, 1996 | ESMO – XXIX. Congress of the European Society for Medical Oncology | 7000 | DMC |
| 2004, 1982 | EAU – XIX. Congress of the European Association of Urology | 6000 | DMC |
| 2004 | XX. Congress of the Transplantation Society | 4500 | PCO |
| 2004 | EUSIPCO – XII. European Signal Processing Conference | 650 | PCO |
| 2004 | WCIPC – VII. World Conference on Injury Prevention | 1200 | PCO |
| 2003 | DGHO - Joint Meeting of the German-, Austrian- and Swiss Society of Haematology and Oncology | 3500 | PCO |
| 2003 | ESGAR – XIV. Annual Meeting of the European Society of Gastrointestinal and Abdominal Radiology | 900 | DMC |
| 2003 | RNA – VIII. Annual Meeting of the RNA Society | 1100 | PCO |
| 2003 | ESC - Congress of the European Society of Cardiology | 25000 | DMC |
| 2003 | MISH – XVII. Meeting of the International Society of Haematology | 1500 | PCO |
| 2002 | WCCM – V. World Congress on Comp. Mechanics | 1000 | PCO |
| 2002 | EFNS – European Federation of Neurological Societies | 3500 | DMC |
| 2002 | EMBEC - European Medical & Biological Engineering Conference | 1000 | PCO |
| 2001, 1999 | ICDE - International Conference of Distance Education | 1800 | PCO |
| 2001 | ICHG – X. International Congress of Human Genetics | 4000 | DMC |
| 2001 | ICO - International Congress on Obesity | 2500 | PCO |
| 2001 | CFC - Cystic Fibrosis Conference | 2000 | PCO |
