| Acronym | Meaning |
 | PARC | Palo Alto Research Center |
| QANTAS | Queensland And Northern Territory Aerial Services |
| NASH | Non-Alcoholic SteatoHepatitis |
| RDDL | Resource Directory Description Language (riddle) |
| ROC | Receiver Operating Characteristic (statistics) - Regional Operations Centre - Republic Of China - Roc-A-Fella Records |
| MPC | Minor Planet Center - Minor Planet Circular |
| MTV | MainosTeleVisio (Finnish Commercial TV Company) - Music TeleVision |
| SSN | Nuclear-Powered Attack Submarine (US Navy Hull Classification) -SIM Serial Number - Social Security Number - Socialist Solidarity Network - Subsystem Number (SCCP |
| GD | Gadolinium |
| RSJ | Rolled Steel Joist (construction) |
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