| Acronym | Meaning |
| PPP | Parallelizing PreProcessor |
| NSDL | National Science Digital Library |
| RECOURSE | Revision Control Unifying Related Environments |
| D/RADEX | Digital Radar Experiment |
| ANS | American National Standard |
| PDF | Probability Density Functions |
| STA | System Technology Associates |
| IR | Infrared |
| NEEDS | N/A |
| ATC | Adiabatic Toroidal Compressor |