man Pages(7):Device and Network Interfaces

sad(7D)- STREAMS Administrative Driver
sbpro(7D)- Sound Blaster Pro, Sound Blaster 16, and Sound Blaster AWE32 audio device driver
sd(7D)- driver for SCSI disk and (ATAPI/SCSI) CD-ROM devices
se(7D)- Siemens 82532 ESCC serial communications driver
se_hdlc(7D)- on-board high-performance serial HDLC interface
ses(7D)- SCSI enclosure services device driver
sesio(7I)- enclosure services device driver interface
sf(7D)- SOC+ FC-AL FCP Driver
smartii(7D)- Compaq Smart-2 EISA/PCI and Smart-2SL PCI Array Controller driver
smc(7D)- SMC 8003/8013/8216/8416 Ethernet device driver
smce(7D)- SMC 3032/EISA dual-channel Ethernet device driver
smceu(7D)- SMC Elite32 Ultra (8232) Ethernet device driver
smcf(7D)- SMC Ether100 (9232) Ethernet device driver
soc(7D)- Serial Optical Controller (SOC) device driver
socal(7D)- Serial Optical Controller for Fibre Channel Arbitrated Loop (SOC+) device driver
sockio(7I)- ioctls that operate directly on sockets
ssd(7D)- driver for SPARCstorage Array and Fibre Channel Arbitrated Loop disk devices
st(7D)- driver for SCSI tape devices
stc(7D)- Serial Parallel Communications driver for SBus
stp4020(7D)- STP 4020 PCMCIA Adapter
streamio(7I)- STREAMS ioctl commands
sxp(7D)- Rockwell 2200 SNAP Streams Driver