| Acronym | Meaning |
| STEP | Standard For Exchange Of Product Model Data |
| RNAV | Radar Navigation |
| X | X Window System |
| R&D | Research And Development |
| IUSS | Integrated Undersea Surveillance System |
| DC | Direct Current |
| ASCII | American Standard Computer Information Interchange |
| TCO | Technical Contracting Office |
| TMDC | Technical Manual Data Card |
| GPM | General Processing Module |