| Acronym | Meaning |
| SEDI | Structure Of The Earth's Deep Interior |
| NCTM | National Council Of Teachers Of Mathematics |
| SR | Steradian |
| BGCWG | Biogeochemistry Working Group |
| DEMVAL | Demonstration And Validation |
| TAP LS | Liquid And Solid Particles |
| CAMAC | Computer-automated Measurement And Control |
| MHS | Message Handling System |
| RIB | Research Internet Backbone |
| GSN | Global Seismic Network |