| Acronym | Meaning |
| RRN | Recurrence Rate Number |
| CNY | Chinese Yuan Renminbi (ISO 4217 Currency Code) |
| PCL | Passive Coherent Location |
| FOC | Full Operational Capability |
| PCB | See Entry |
| PLCC | Plastic Leaded Chip Carrier (electronics) |
| UNLV | University Of Nevada |
| SND | Standard Nomenclature Database |
| XHR | EXtra High Image Resolution - XMLHTTPRequest |
| W/O | Without: Software W/o Documentation |