- SA_NOCLDSTOP
- SA_NOMASK
- SA_ONESHOT
- SCREEN_END
- SCREEN_START
- SEEK_CUR
- SEEK_END
- SEEK_SET
- SEEK_STAT
- SEGMENT_SIZE
- SETUP_SECTS
- SIGABRT
- SIGALRM
- SIGCHLD
- SIGCONT
- SIGFPE
- SIGHUP
- SIGILL
- SIGINT
- SIGIOT
- SIGKILL
- SIGN
- SIGPIPE
- SIGQUIT
- SIGSEGV
- SIGSTKFLT
- SIGSTOP
- SIGTERM
- SIGTRAP
- SIGTSTP
- SIGTTIN
- SIGTTOU
- SIGUNUSED
- SIGUSR1
- SIGUSR2
- SIG_BLOCK
- SIG_DFL
- SIG_IGN
- SIG_SETMASK
- SIG_UNBLOCK
- SMALL
- SPACE
- SPECIAL
- ST0
- ST0_DS
- ST0_ECE
- ST0_HA
- ST0_INTR
- ST0_NR
- ST0_SE
- ST1
- ST1_CRC
- ST1_EOC
- ST1_MAM
- ST1_ND
- ST1_OR
- ST1_WP
- ST2
- ST2_BC
- ST2_CM
- ST2_CRC
- ST2_MAM
- ST2_SEH
- ST2_SNS
- ST2_WC
- ST3
- ST3_HA
- ST3_TZ
- ST3_WP
- START_CHAR
- STATUS_BUSY
- STATUS_BUSYMASK
- STATUS_DIR
- STATUS_DMA
- STATUS_READY
- STDERR_FILENO
- STDIN_FILENO
- STDOUT_FILENO
- STOP_CHAR
- STRINGIFY
- SUPER_MAGIC
- SUSPEND_CHAR
- S_IFBLK
- S_IFCHR
- S_IFDIR
- S_IFIFO
- S_IFMT
- S_IFREG
- S_IRGRP
- S_IROTH
- S_IRUSR
- S_IRWXG
- S_IRWXO
- S_IRWXU
- S_ISBLK
- S_ISCHR
- S_ISDIR
- S_ISFIFO
- S_ISGID
- S_ISREG
- S_ISUID
- S_ISVTX
- S_IWGRP
- S_IWOTH
- S_IWUSR
- S_IXGRP
- S_IXOTH
- S_IXUSR