| Acronym | Meaning |
 | DPDT | Double-Pole Double-Throw |
| IDO | Ido Language (ISO 639-2 Code) |
| MACA | Military Aid To The Civil Authorities |
| SOCCSKSARGEN | South Cotabato |
| JFHQ | NCR -Joint Force Headquarters National Capital Region |
| ZG | Zeptogram |
| AMTE | UK Admiralty Marine Technology Establishment (1977?1984) |
| UPF | Universitat Pompeu Fabra (Catalan |
| FXX | Metropolitan France (ISO 3166 Trigram; Obsolete 1997) |
| A/D | Analog/Digital |
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