- RAMDISK
- RAMDISK_SIZE
- RAND_HEAD_LEN
- RAW_DEBUG
- RBCR0
- RBCR1
- RCR
- RCV_SHUTDOWN
- RC_CHOP
- RC_DOWN
- RC_RND
- RC_UP
- RD0
- RD1
- RD2
- RDC
- RDCE
- READ
- READA
- READY_STAT
- READ_10
- READ_6
- READ_BLOCK_LIMITS
- READ_BUFFER
- READ_CAPACITY
- READ_DEFECT_DATA
- READ_LONG
- READ_POSITION
- READ_REVERSE
- REALLY_SLOW_IO
- REASSIGN_BLOCKS
- RECAL_FREQ
- RECEIVE_DIAGNOSTIC
- RECONNECT_NOW
- RECOVERED_ERROR
- RECOVER_BUFFERED_DATA
- RECV_MASK
- REDO
- REG_
- RELEASE
- REMOVE_FROM_MEM_QUEUE
- REMOVE_LINKS
- REQUEST_SENSE
- REQ_CMDOUT
- REQ_DATAIN
- REQ_DATAOUT
- REQ_MASK
- REQ_MSGIN
- REQ_MSGOUT
- REQ_STATIN
- RESELECTION
- RESERVATION_CONFLICT
- RESERVE
- RESERVED
- RESET_FREQ
- RESET_TIMEOUT
- RESTORE_ALL
- RESTORE_MOST
- RESTORE_POINTERS
- RESV0
- RESV1
- RESV2
- RETSIGTYPE
- REZERO_UNIT
- RE_ENTRANT_CHECK_OFF
- RE_ENTRANT_CHECK_ON
- RLIMIT_CORE
- RLIMIT_CPU
- RLIMIT_DATA
- RLIMIT_FSIZE
- RLIMIT_MEMLOCK
- RLIMIT_NPROC
- RLIMIT_OFILE
- RLIMIT_RSS
- RLIMIT_STACK
- RLIM_INFINITY
- RLIM_NLIMITS
- RNDUP4
- ROUND_TO_MULTIPLE
- ROUND_UP
- RO_IOCTLS
- RPC_AUTH_BADCRED
- RPC_AUTH_BADVERF
- RPC_AUTH_ERROR
- RPC_AUTH_NULL
- RPC_AUTH_REJECTEDCRED
- RPC_AUTH_REJECTEDVERF
- RPC_AUTH_SHORT
- RPC_AUTH_TOOWEAK
- RPC_AUTH_UNIX
- RPC_CALL
- RPC_GARBAGE_ARGS
- RPC_MISMATCH
- RPC_MSG_ACCEPTED
- RPC_MSG_DENIED
- RPC_PROC_UNAVAIL
- RPC_PROG_MISMATCH
- RPC_PROG_UNAVAIL
- RPC_REPLY
- RPC_SUCCESS
- RPC_VERSION
- RQ_THRESHOLD_HW
- RQ_THRESHOLD_LW
- RR_CL
- RR_NM
- RR_PL
- RR_PN
- RR_PX
- RR_RE
- RR_RR
- RR_SL
- RR_TF
- RSAR0
- RSAR1
- RSR
- RSS_COUNT
- RSS_FREE
- RSS_NAME
- RSS_START
- RST
- RS_EVENT_BREAK
- RS_EVENT_HANGUP
- RS_EVENT_OPEN_WAKEUP
- RS_EVENT_READ_PROCESS
- RS_EVENT_WRITE_WAKEUP
- RS_TIMER
- RUSAGE_BOTH
- RUSAGE_CHILDREN
- RUSAGE_SELF
- RXE
- RXEE
- Read_FIFO
- Read_Loopback
- Read_SCSI_Data