- pcg_abtb
- pcg_abtbc
- pci
- pcib
- pcic
- pcii
- pcm
- pcn
- pcp.conf
- pcp.env
- PDB
- penmount
- perfmon
- pf
- pflog
- pfsync
- PGABuildDatatype
- PGAGetCommunicator
- PGAGetNumProcs
- PGAGetRank
- PGAReceiveIndividual
- PGASendIndividual
- PGASendReceiveIndividual
- PGASetCommunicator
- pgmres
- pim
- pmieconf
- pminres
- pminres_abtb
- pminres_abtbc
- pmns
- pnp
- pnpbios
- polling
- port
- ppbus
- ppc
- ppi
- procdesc
- psm
- pst
- pt
- ptmx
- pts
- pts
- pty
- puc
- puzawa
- r128
- radeon
- radeonhd
- ral
- ram
- random
- random
- rc
- re
- rendition
- rgephy
- riesz
- rl
- rndtest
- route
- rp
- rsu
- rsufw
- rtc
- rue
- rum
- run
MAN (4)
Special files (usually devices, those found in /dev) and drivers