| Acronym | Meaning |
| GNU | GNU's Not UNIX (a Recursive Acronym) |
| ALE | Arbitrary Lagrangian-Eulerian |
| NCMC | Non-Classical Mesoscale Circulations |
| NPP | Net Primary Productivity |
| MCA | Manufacturing Chemists Association |
| MLM | Time-varying Horizontal Model Of The Lavoice Type |
| APARE | Asian/Pacific Regional Experiment |
| SCPP | Sierra Cooperative Pilot Project |
| LED | Light Emitting Diode |
| APS | Atomic Power Station |