| Acronym | Meaning |
 | HU | Hungary (ISO 3166 Digram; FIPS 10-4 Country Code) |
| CHV | Chuvash Language (ISO 639-2 Code) |
| ZM | Zettametre |
| GA | Gallium - Gigaannum |
| HIDACZ | High-Density Airspace Control Zone (high Dak Zed/zee) |
| RGBI | Red Green Blue Intensity (ditto) |
| PSA | Paralysis Society Of America - Pharmaceutical Society Of Australia - Pressure-Sensitive Adhesive - Production Services Association - Prostate Specific Antigen - Public Service Announcement - Public Service Association |
| TAT | Tatar Language (ISO 639-2 Code) |
| CSA | Canadian Space Agency - Canadian Standards Association - Child Support Agency - Command Staff Advisor - Community-supported Agriculture - Confederate States Of America - Corps Storage Area -Czech Airlines |
| KERA | Kentucky Education Reform Act (of 1990) |
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