| Acronym | Meaning |
| ADU | Analog-to-digital Unit |
| MOSIGT | Metal-oxide Semiconductor Insulated Gate Transistor |
| PD | Photoelectron Diffraction |
| PVA | Polyvinyl Alcohol |
| PLC | Programmable Logic Controller |
| TCR | Total Chlorine Residual |
| KLH | Keyhole Limpet Hemocyanin |
| PFNA | Pulsed Fast-neutron Analysis |
| AAHIS | Advanced Airborne Hyperspectral Imaging System |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |