| 1 (7) | National Aeronautics and Space Administration * | USA |  |
| 2 (26) | National Oceanic and Atmospheric Administration | USA | |
| 3 (33) | Jet Propulsion Laboratory | USA | |
| 4 (55) | NASA Goddard Space Flight Center | USA | |
| 5 (56) | Smithsonian Institution * | USA | |
| 6 (60) | Harvard-Smithsonian Center for Astrophysics | USA | |
| 7 (67) | United States Geological Survey | USA | |
| 8 (86) | National Center for Atmospheric Research | USA | |
| 9 (127) | United States Department of Agriculture | USA | |
| 10 (226) | NASA Goddard Institute for Space Studies | USA | |
| 11 (259) | U.S. Department of Energy * | USA | |
| 12 (263) | National Energy Technology Laboratory | USA | |
| 13 (296) | SLAC National Accelerator Laboratory | USA | |
| 14 (328) | Space Telescope Science Institute | USA | |
| 15 (355) | Lawrence Berkeley National Laboratory * | USA | |
| 16 (370) | Infrared Processing and Analysis Center | USA | |
| 17 (382) | US Environmental Protection Agency | USA | |
| 18 (390) | Pacific Northwest National Laboratory * | USA | |
| 19 (415) | Los Alamos National Laboratory * | USA | |
| 20 (441) | United States Fish and Wildlife Service | USA | |
| 21 (469) | Lawrence Livermore National Laboratory * | USA | |
| 22 (484) | National Radio Astronomy Observatory Charlottesville | USA | |
| 23 (508) | Oak Ridge National Laboratory | USA | |
| 24 (515) | Oak Ridge Institute for Science and Education | USA | |
| 25 (538) | National Institute of Standards and Technology * | USA | |
| 26 (610) | Smithsonian Environmental Research Center | USA | |
| 27 (751) | American Museum of Natural History | USA | |
| 28 (762) | NASA Ames Research Center | USA | |
| 29 (763) | NASA Langley Research Center | USA | |
| 30 (778) | U.S. Air Force | USA | |
| 31 (820) | Argonne National Laboratory * | USA | |
| 32 (845) | National Renewable Energy Laboratory | USA | |
| 33 (863) | Smithsonian National Museum of Natural History | USA | |
| 34 (957) | US Naval Research Laboratory | USA | |
| 35 (967) | Joint Institute for Laboratory Astrophysics | USA | |
| 36 (981) | National Radio Astronomy Observatory, Socorro | USA | |
| 37 (1021) | Fermi National Accelerator Laboratory | USA | |
| 38 (1030) | University of Maryland, Center for Environmental Science | USA | |
| 39 (1084) | Brookhaven National Laboratory * | USA | |
| 40 (1197) | Sandia National Laboratories, New Mexico | USA | |
| 41 (1261) | US National Science Foundation * | USA | |
| 42 (1517) | National High Magnetic Field Laboratory | USA | |
| 43 (1620) | Idaho National Laboratory | USA | |
| 44 (1715) | NASA Marshall Space Flight Center | USA | |
| 45 (1862) | NASA Johnson Space Center | USA | |
| 46 (1918) | Environmental Molecular Sciences Laboratory | USA | |
| 47 (2129) | Glenn Research Center | USA | |
| 48 (2206) | NASA Stennis Space Center | USA | |
| 49 (2254) | Field Museum Natural History | USA | |
| 50 (2308) | Princeton Plasma Physics Laboratory | USA | |
| 51 (2816) | National Research Council of the National Academies | USA | |
| 52 (3139) | U.S. Army * | USA | |
| 53 (3145) | Natural History Museum of los Angeles County | USA | |
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