| Acronym | Meaning |
 | PAL | Phase Alternating Line (TV Standard) -Philippine Airlines |
| HUN | Hungarian Language (ISO 639-2 Code) |
| RACON | RAdar BeaCON |
| KSC | Kennedy Space Center |
| LTI | Linear Time-Invariant |
| QIP | Quadrilateral Interoperability Programme (ancestor Of MIP; Quip) |
| IDL | Interface Definition Language |
| NZ | New Zealand (ISO 3166 And FIPS 10-4 Country Code Digram) |
| HD | Henry Draper (star Catalogue) - Hull-Down (armoured Vehicle Target |
| HSPH | Harvard School Of Public Health |
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