- uep
- ufm
- ufoma
- uftdi
- ugen
- uhci
- uhid
- uhso
- uipaq
- ukbd
- ulpt
- umass
- umcs
- umct
- umodem
- ums
- unix
- upgt
- uplcom
- ural
- urandom
- urio
- urndis
- urtw
- urtwn
- urtwnfw
- usb
- usb_quirk
- usb_template
- uslcom
- utopia
- uvisor
- uvscom
- v4l
- vale
- vcs
- vcsa
- vesa
- vga
- vge
- viapm
- viawd
- vinum
- virtio
- virtio_balloon
- virtio_blk
- virtio_random
- virtio_scsi
- vkbd
- vlan
- vmmouse
- vmware
- vmx
- void
- voodoo
- vpd
- vpo
- vr
- vt
- vte
- vtnet
- vx
- vxge
- wacom
- watchdog
- wavelan
- wax
- wb
- wbwd
- wi
MAN (4)
Special files (usually devices, those found in /dev) and drivers