| Abbreviation | Definition |
|---|---|
| SPI2 | Specialist (punch-card Accounting Machine Operator) Petty Officer 2nd Class |
| SPI3 | ecialist (punch-card Accounting Machine Operator) Petty Officer 3rd Class |
| SPI3 | Specialist (punch-card Accounting Machine Operator) Petty Officer 3rd Class |
| SPM1 | ecialist (mailman) Petty Officer 1st Class |
| SPM1 | Specialist (mailman) Petty Officer 1st Class |
| SPM2 | ecialist (mailman) Petty Officer2nd Class |
| SPM2 | Specialist (mailman) Petty Officer2nd Class |
| SPM3 | ecialist ((mailman)) |
| SPM3 | Specialist ((mailman)) |
| SPO1 | ecialist (inspector Of Naval Materials) Petty Officer 1st Class |
| SPO1 | Specialist (inspector Of Naval Materials) Petty Officer 1st Class |
| SPO2 | ecialist (inspector Of Naval Material) Petty Officer 2nd Class |
| SPO2 | Specialist (inspector Of Naval Material) Petty Officer 2nd Class |
| SPO3 | ecialist (inspector Of Naval Material) Petty Officer 3rd Class |
| SPO3 | Specialist (inspector Of Naval Material) Petty Officer 3rd Class |
| SPOAV1 | Specialist (inspector Of Aviation Material) Petty Officer 1st Class |
| SPOAV2 | Specialist (inspector Of Aviation Material) Petty Officer 2nd Class |
| SPOAV3 | Specialist (inspector Of Aviation Material) Petty Officer 3rd Class |
| SPOAVC | Specialist (inspector Of Aviation Material) Chief Petty Officer |
| SPOC | ecialist (mailman) Chief Petty Officer |