| Acronym | Meaning |
| ANOVA | ANalysis Of VAriance |
| IDC | International Data Corporation |
| PT | Petatesla -Physical Training (in The Army) -Portugal (ISO 3166 Digram) |
| ISSN | International Standard Serial Number (ISO 3297) |
| MOTA | Member Of The Orthodontic Technicians Association |
| XH | Xhosa Language (ISO 639-1 Code) |
| SSO | Submarine Oiler (retired US Navy Hull Classification) |
| SQUID | Superconducting QUantum Interference Device |
| AESR | Aeronautical Equipment Service Record |
| JY | Japanese Yen |