| 1 | SDS | CAA Training Standards | Callsign: Standards, | GB | AVCODES |
| 2 | SDS | United Kingdom Civil Aviation Authority | | | ICAO1 |
| 3 | SDS | SUNDANCE STAGE LINES INC A CALIFORN | | | SCAC4 |
| 4 | SDSB | SCULLY DISTRIBUTION SERVICES INC (L | | | SCAC4 |
| 5 | SDSC | S & D SERVICES INC | | | SCAC4 |
| 6 | SDSD | STEED STANDARD TRANSPORT LIMITED | | | SCAC4 |
| 7 | SDSE | SURE DELIVERY SERVICE, INC | | | SCAC1 |
| 8 | SDSH | SEAYS DELIVERY SERVICE AIR FREIGHT | | | SCAC4 |
| 9 | SDSI | SELEX DELIVERY SYSTEMS INC | | | SCAC4 |
| 10 | SDSJ | SCOTIAN DISTRIBUTION SERVICES LIMIT | | | SCAC4 |
| 11 | SDSN | S D S LOGISTICS SERVICES | | | SCAC4 |
| 12 | SDSO | SDS DE MEXICO SA DE CV | | | SCAC4 |
| 13 | SDSR | STELLAR DISTRIBUTION SERVICES INC | | | SCAC4 |
| 14 | SDSU | SOO LINE RAILROAD | | | PWRC |
| 15 | SDSU | Soo Line Railroad (Canadia Pacific Railway) | | | RSRV |
| 16 | SDSV | SAYER DELIVERY SERVICE INC | | | SCAC4 |
| 17 | SDSW | SHEPAUG DISTRIBUTION SERVICES LLC | | | SCAC4 |
