| Acronym | Meaning |
| DI | Direct Injection (engine; Diesel) |
| 3P | Pollution Prevention Pays |
| HCCI | Homogeneous Charge Compression Ignition |
| SFA | Saturated Fatty Acid |
| UFFI | Urea-formaldehyde Foam Insulation |
| HASP | Health And Safety Plan |
| STP | Similarity Transformation (based) Perturbation (theory) |
| BHSIP | Bottom-hole Shut-in Pressure |
| LEC | Light-emitting Electrochemical Cell |
| STN | Subthalamic Nucleus |