| Acronym | Meaning |
| HO | Honduras (FIPS 10-4 Country Code) |
| DDA | Digital Differential Analyzer - Deputy District Attorney |
| MHZ | Megahertz |
| SRAM | Static Random Access Memory (ess-ram) |
| COK | Cook Islands (ISO 3166 Trigram) |
| SSO | Submarine Oiler (retired US Navy Hull Classification) |
| HM | Heard Island And McDonald Islands (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| LA | Laos (FIPS 10-4 Country Code; ISO 3166 Digram) -Los Angeles -Louisiana (postal Symbol) |
| PMOS | P-type/Positive Metal-Oxide-Semiconductor Transistor (pee-moss) |
| COS | Cooper Ornithological Society |