| Answer | Crossword Clue |
|---|---|
| RPM | Speed letters |
| MPH | Speed letters |
| MPH | Speed-limit letters |
| MPH | Speed limit letters |
| MBPS | Broadband speed letters |
| IAS | Plane-speed letters |
| MPH | Auto speed letters |
| DSL | High-speed letters |
| MPH | Speed measure letters |
| ISO | Film speed letters |
| ASA | Film speed letters |
| KPH | Saskatchewan speed-limit letters |
| DSL | High-speed Internet letters |
| RPMS | Letters denoting motor speed |
| MPH | Letters of concern in "Speed" |
| REO | Letters before Speedwagon (the band) or Speed Wagon (the car) |
