| Acronym | Meaning |
| PCMDI | Program For Climate Model Diagnosis And Intercomparison |
| AARP | American Association Of Retired People |
| HYPERCHANNNEL | High-speed Communications Link |
| POGO | Polar Orbiting Geophysical Observatory |
| IF | Intermediate Frequency |
| ITC | Information Technology Council |
| UID | User Identification |
| ILEC | International Lake Environment Committee |
| DDN | Data Defense Network |
| I/O | Input/output |