| Acronym | Meaning |
| MLSO | Mauna Loa Solar Observatory |
| PSU | Pennsylvania State University |
| OMNET | N/A |
| NSO | National Solar Observatory |
| GRGC | Geologic Record Of Global Change |
| U.S./JC | United States/Japan Cooperation |
| CCB | Configuration Control Board |
| AHERA | Asbestos Hazard Emergency Response Act |
| VLBI | Very Long Baseline Interferometry |
| ASH CAN | Project Ash Can |