- snd_uaudio
- snd_via8233
- snd_via82c686
- snd_vibes
- snp
- sound
- speaker
- spic
- spkr
- splash
- sppp
- st
- stderr
- stdin
- stdout
- ste
- stf
- stg
- stge
- streams
- svr4
- sym
- synaptics
- syncache
- syncer
- syscons
- sysmouse
- tap
- targ
- tcp
- tdfx
- terasic_mtl
- termios
- textdump
- ti
- timecounters
- tl
- tnt4882
- tpm
- trident
- trm
- tseng
- tslib
- tty
- ttyI
- ttyS
- tty_ioctl
- tun
- twa
- twconfig
- twe
- twpolicy
- tws
- tx
- txp
- u3g
- uark
- uart
- uath
- ubsa
- ubsec
- ubser
- ubtbcmfw
- uchcom
- ucom
- ucycom
- udav
- udbp
- udp
- udplite
MAN (4)
Special files (usually devices, those found in /dev) and drivers