| Abbreviation | Definition |
|---|---|
| SDI | Sea Dentist, Inc. |
| SDI | Seamless Development Inc |
| SDI | Security Dynamics Inc |
| SDI | Spectral Diagnostics, Inc. |
| SDI | Spraying Devices Inc |
| SDI | Standard Diversified Inc |
| SDI | Steel Dynamics Inc |
| SDI | Structural Diagnostics Inc |
| SDI | Subtitling Dubbing International |
| SDI | Systems Design Inc |
| SDI | Systems Distributors Inc |
| SDI | Systems Division Inc |
| SDI | Systems Documentation Inc |
| SDIC | San Domingo Improvement Company |
| SDIC | Sandy Drainage Improvement Company |
| SDJ | Seven Dollar Jacket |
| SDJ | Surat Diamond Jewellery |
| SDKB | Sydney Design Kitchens & Bathrooms (Sydney Australia) |
| SDKC | Showa Denko Carbon, Inc. |
| SDL | Strings Direct Limited |