Section 4 of the manual describes special files (devices).
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- rose
- AF_ROSE - Rose amateur packet radio protocol family
- route
- kernel packet forwarding database
- rp
- driver for Comtrol RocketPort Intelligent Serial Port Cards
- rr232x
- hptrr — HighPoint RocketRAID device driver
- rsu
- Realtek RTL8188SU/RTL8192SU USB IEEE 802.11b/g/n wireless network device
- rsufw
- Firmware Module for Realtek driver
- rtc
- real-time clock
- rtwn
- Realtek IEEE 802.11 wireless network driver
- rtwn_pci
- Realtek PCI device glue
- rtwn_usb
- Realtek USB device glue
- rtwnfw
- Firmware Module for Realtek Wireless driver
- rue
- RealTek RTL8150 USB to Fast Ethernet controller driver
- rum
- Ralink Technology USB IEEE 802.11a/b/g wireless network device
- run
- Ralink Technology USB IEEE 802.11a/g/n wireless network device
- runfw
- Firmware Module for Ralink driver
- sa
- SCSI Sequential Access device driver
- safe
- SafeNet crypto accelerator
- safexcel
- Inside Secure SafeXcel-IP-97 security packet engine
- savage
- S3 Savage video driver
- sbni
- Granch SBNI12 leased line modem driver
- sbp
- Serial Bus Protocol 2 (SBP-2) Mass Storage Devices driver
- sbp_targ
- Serial Bus Protocol 2 (SBP-2) Target Mode devices driver
- sc
- syscons , sc — the console driver
- scbus
- CAM — Common Access Method Storage subsystem
- scc
- driver for Serial Communications Controllers (SCC) devices
- sched_4bsd
- 4.4BSD scheduler
- sched_ule
- ULE scheduler
- screen
- pc display interface
- screensaver
- splash — splash screen / screen saver interface
- scsi
- CAM — Common Access Method Storage subsystem
- sctp
- Internet Stream Control Transmission Protocol
- sd
- driver for SCSI disk drives
- sdhci
- PCI SD Host Controller bridge driver
- sem
- POSIX semaphores
- send
- Kernel side support for Secure Neighbor Discovery (SeND)
- ses
- SCSI Environmental Services driver
- sf
- Adaptec AIC-6915 “Starfire” PCI Fast Ethernet adapter driver
- sge
- Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet driver
- siba
- Sonic Inc. Silicon Backplane driver
- siftr
- SIFTR — Statistical Information For TCP Research
- siis
- SiliconImage Serial ATA Host Controller driver
- siliconmotion
- Silicon Motion video driver
- simplebus
- ePAPR simple-bus driver
- sio
- fast interrupt driven asynchronous serial communications interface
- sis
- SiS 900, SiS 7016 and NS DP83815/DP83816 Fast Ethernet device driver
- sisusb
- SiS USB video driver
- sk
- SysKonnect SK-984x and SK-982x PCI Gigabit Ethernet adapter driver
- skey
- OPIE - One-time Passwords In Everything
- smapi
- System Management Application Program Interface driver
- smartpqi
- Microsemi Smart Family SCSI driver
- smb
- SMB generic I/O device driver
- smbios
- System Management BIOS
- smbus
- System Management Bus
- smp
- SMP — description of the FreeBSD Symmetric Multi-Processor kernel
- smsc
- USB SMSC LAN9xxx Fast Ethernet driver
- sn
- Ethernet driver for SMC91Cxx based cards
- snd
- sound , pcm , snd — FreeBSD PCM audio device infrastructure
- snd_ad1816
- Analog Devices AD1816 ISA bridge device driver
- snd_ak452x
- snd_envy24 — VIA Envy24 and compatible bridge device driver
- snd_als4000
- Avance Logic ALS4000 PCI bridge device driver
- snd_atiixp
- ATI IXP bridge device driver
- snd_cmi
- CMedia CMI8338/CMI8738 PCI bridge device driver
- snd_cs4281
- Crystal Semiconductor CS4281 PCI bridge device driver
- snd_csa
- Crystal Semiconductor CS461x/462x/4280 PCI bridge device driver
- snd_ds1
- Yamaha DS-1 PCI bridge device driver
- snd_emu10k1
- SoundBlaster Live! and Audigy PCI bridge device driver
- snd_emu10kx
- Creative SoundBlaster Live! and Audigy sound cards device driver
- snd_envy24
- VIA Envy24 and compatible bridge device driver
- snd_envy24ht
- VIA Envy24HT and compatible bridge device driver
- snd_es137x
- Ensoniq AudioPCI ES137x bridge device driver
- snd_ess
- Ensoniq ESS ISA PnP/non-PnP bridge device driver
- snd_fm801
- Forte Media FM801 bridge device driver
- snd_gusc
- Gravis UltraSound ISA bridge device driver
- snd_hda
- Intel High Definition Audio bridge device driver
- snd_hdspe
- RME HDSPe bridge device driver
- snd_ich
- Intel ICH AC'97 and compatible bridge device driver
- snd_maestro
- ESS Maestro bridge device driver
- snd_maestro3
- ESS Maestro3/Allegro-1 bridge device driver
- snd_mss
- Microsoft Sound System ISA PnP/non-PnP bridge device driver
- snd_neomagic
- NeoMagic 256AV/ZX bridge device driver
- snd_sb16
- snd_sbc , snd_sb16 , snd_sb8 — Creative Sound Blaster ISA and compatible bridge device driver
- snd_sb8
- snd_sbc , snd_sb16 , snd_sb8 — Creative Sound Blaster ISA and compatible bridge device driver
- snd_sbc
- snd_sbc , snd_sb16 , snd_sb8 — Creative Sound Blaster ISA and compatible bridge device driver
- snd_solo
- ESS Solo-1/1E PCI bridge device driver
- snd_spicds
- I2S SPI audio codec driver
- snd_t4dwave
- Trident 4DWave bridge device driver
- snd_uaudio
- USB audio and MIDI device driver
- snd_via8233
- VIA Technologies VT8233 bridge device driver
- snd_via82c686
- VIA Technologies 82C686A bridge device driver
- snd_vibes
- S3 SonicVibes bridge device driver
- snp
- tty snoop interface
- solver
- direct and iterative solver (rheolef-7.2)
- solver_abtb
- mixed systems solver (rheolef-7.2)
- solver_option
- direct and iterative solver options (rheolef-7.2)
- sound
- sound , pcm , snd — FreeBSD PCM audio device infrastructure
- speaker
- speaker , spkr — console speaker device driver
- spigen
- SPI generic I/O device driver
- spkr
- speaker , spkr — console speaker device driver
- spl
- parameters of the SPL kernel module
- splash
- splash screen / screen saver interface