| 1 (12) | United States Department of Agriculture | USA |  |
| 2 (17) | United States Geological Survey | USA | |
| 3 (70) | Smithsonian Institution * | USA | |
| 4 (74) | National Center for Biotechnology Information | USA | |
| 5 (78) | National Oceanic and Atmospheric Administration | USA | |
| 6 (105) | Doe Joint Genome Institute | USA | |
| 7 (155) | Lawrence Berkeley National Laboratory * | USA | |
| 8 (172) | National Aeronautics and Space Administration * | USA | |
| 9 (179) | U.S. Department of Energy * | USA | |
| 10 (185) | Smithsonian National Museum of Natural History | USA | |
| 11 (231) | Oak Ridge National Laboratory | USA | |
| 12 (239) | US Food and Drug Administration | USA | |
| 13 (262) | National Center for Atmospheric Research | USA | |
| 14 (288) | Pacific Northwest National Laboratory | USA | |
| 15 (294) | American Museum of Natural History | USA | |
| 16 (298) | US Environmental Protection Agency | USA | |
| 17 (299) | Lawrence Livermore National Laboratory * | USA | |
| 18 (352) | United States Fish and Wildlife Service | USA | |
| 19 (360) | Los Alamos National Laboratory * | USA | |
| 20 (397) | Field Museum Natural History | USA | |
| 21 (399) | Jet Propulsion Laboratory | USA | |
| 22 (407) | U.S. Army * | USA | |
| 23 (410) | Oak Ridge Institute for Science and Education | USA | |
| 24 (415) | Missouri Botanical Garden | USA | |
| 25 (437) | NASA Ames Research Center | USA | |
| 26 (489) | Smithsonian Environmental Research Center | USA | |
| 27 (524) | NASA Goddard Space Flight Center | USA | |
| 28 (548) | University of Maryland, Center for Environmental Science | USA | |
|
