SCCS: Source Code Control System
SCNA: Sun Certified Network Administrator for Solaris
SCSA: Sun Certified System Administrator for Solaris
SCSAS: Sun Certified Solaris Associate
SCSECA: Sun Certified Security Administrator for Solaris
SDB: Symbolic Debugger
sed: stream editor
Sh: Shell
SHAR: Shell Archive
SIGABRT: signal: abort
SIGALRM: signal: alarm clock
SIGBUS: signal: bus error
SIGCHLD: signal: child
SIGCONT: signal: continue
SIGEMT: signal: EMT instruction
SIGFPE: signal: floating point exception
SIGHUP: signal: hangup
SIGILL: signal: illegal instruction
SIGINT: signal: interruption
SIGIO: signal: input/output
SIGSEGV: signal: segmentation violation
SIGSYS: signal: system call
SIGTERM: signal: terminate
SIGTSTP: Signal: terminal stop
SIGTTIN: signal: TTY input
SIGTTOU: signal: TTY output
SIGURG: signal: urgent I/O condition
SIGUSR1: signal: user-defined signal 1
SIGWINCH: signal: window changed
Sinix: Siemens Unix
SIPP: SImple Polygone Processor
stty: set tty
su: superuser
SVABI: System V Application Binary Interface
SVID: System V Interface Definition
SVR3: System V Release 3
SVR4: System V Release 4
Sync: synchronize
SYSV: System V
SZ: Send ZModem