| AAFCADC | AAFC-AESB Agroforestry Development Centre | Henry de Gooijer |
| ASRC | AAFC Saskatoon Research Centre | David Wall |
| AIBU | Abant Izzet Baysal University | |
| ABUS | Abt. Botanik und Standortskunde | Albrecht Franke |
| ADM | Abu Dhabi Municipality | Abdullah Nasser Al Jeneini |
| AS | Academia Sinica | Ching-I Peng |
| AASS | Academy of Agriculture and Silviculture Sciences | Valeriu C. Enescu |
| AAU | Addis Ababa University | |
| AMCBS | A.D. Marble & Company | Kim Mallatratt |
| ATL | Advanced Technologies Limited | |
| EOAE | Aegean Forestry Research Institute - Turkey | Nihal Vzel |
| N/A | Agencourt Biosciences | |
| AROV | Agricultural Research Organization, Volcani | Yitzhak Spiegel |
| ATPL | Agricultural Technology Partners, L.P. | |
| AUG | Agricultural University of Gembloux | André Théwis |
| AUK | Agricultural University of Krakow | Janusz Żmija |
| AUN | Agricultural University of Norway | Knut Hove |
| AUS | Agricultural University of Shandong | |
| ACMU | Agriculture Chiang Mai University | |
| AFF | Agriculture Fisheries and Forestry | |
| ARI | Agrotechnological Research Institute, Wageningen | Monique van Wordragen |
| AKU | Akdeniz University | Zeynep Tuğçe |
| AFS | Alberta Forest Service | |
| ALF | Alberta Lands and Forests | |
| AFI | Alberta-Pacific Forest Industries | |
| AP | Amcor Plantations | |
| AFM | ANM Forest Management | Sandra Hetherington |
| APSU | Appalachian State University | |
| AMGL | Applied Molecular Genetics Laboratory | |
| ARGA | Aqua Resources | Dr. John Cairney |
| RS | Aracruz Cellulose S.A. (Riocell) | FERNANDO DE LELLIS GARCIA BERTOLUCCI |
| ACSA | Aracruz Celulose S.A. | |
| AM | Arboretum Mustila | |
| VAS | Arboretum Sofronka Plzeň (Czech Republic) | Kaňak Jan |
| A | ArborGen | Jeff Wright |
| AFRI | Arid Forest Research Institute | R. L. Srivastava |
| AUT | Aristotelian University of Thessaloniki | |
| ASU | Arizona State University | |
| AW | Arjo Wiggins | |
| AFTSC | ASEAN Forest Tree Seed Center | |
| ACC | Ashland Community College | |
| APPC | Asia Pulp & Paper Company Ltd. | |
| ASTA | AssiDomdn Skog & Trd AB | Arne Gustavsson |
| AUU | Auburn University | |
| ANU | Australian National University | |
| APP | Australian Paper Plantations | |
| ATSC | Australian Tree Seed Centre | |
| ARC | Austrian Research Center | |
| UAAAN | Autonomous Agrarian University Antonio Narro - Mexico | Adalberto Benavides Mendoza |
| WFC | A W Faber Castell | Eliane Fiorentini |