Table D-1
| Subdirectory | Driver description |
| sst | Simple SCSI target driver |
| bst | Block SCSI target driver |
| cgsix | Graphics device driver |
| psli | Data link provider interface (DLPI) network driver template |
| pio | Programmed I/O template driver |
| dma | DMA driver template |
| ramdisk | Simple RAM disk pseudo-device driver |
| glm | PCI SCSI Host Bus Adapter (HBA) driver -- NCR 82C810, 820, 825 |
| ae | PCI DLPI network device -- AMD PCnet |
| p9000 | PCI frame buffer -- Diamond Viper/Weitek P9000 |
| pvip | PCI frame buffer -- Diamond Viper/Weitek P9000 |
| tblt | STREAMS input device |
| isp | SBus and PCI SCSI HBA driver QLogics isp 1000/1020 |