-sinh, cosh, tanh (3M) - hyperbolic functions
-size (1) - size of an object file
-sleep (1) - suspend execution for an interval
-sleep (3) - suspend execution for interval
-soelim (1) - eliminate \&.so's from nroff input
-sort (1) - sort or merge files
-spell, spellin, spellout (1) - find spelling errors
-spice (1) - electronic circuit simulation program
-spline (1G) - interpolate smooth curve
-split (1) - split a file into pieces
-ssp (1) - limit to single spacing
-stat, fstat (2) - get file status
-stdio (3S) - standard buffered input/output package
-sticky (8) - executable files with persistent text
-stime (2) - set time
-strcat, strcatn, strcmp, strcmpn, strcpy, strcpyn, strlen, index, rindex (3) - string operations
-strings (1) - find the printable strings in a object, or other binary, file
-strip (1) - remove symbols and relocation bits
-struct (1) - structure Fortran programs
-stty (1) - set terminal options
-stty, gtty (2) - set and retrieve terminal modes
-su (1) - substitute user id temporarily
-sum (1) - sum and count blocks in a file
-swab (3) - swap bytes
-symorder (1) - rearrange name list
-sync (1M) - update the super block
-sync (2) - update super-block
-sysgen (8) - UNIX system generation from the distribution tape
-system (3) - issue a shell command
-tabs (1) - set terminal tabs
-tail (1) - deliver the last part of a file
-tar (1) - tape archiver
-tbl (1) - format tables for nroff or troff
-tc (1) - photypesetter simulator
-tee (1) - pipe fitting
-termcap (5) - terminal capability data base
-terminals (7) - conventional names
-test (1) - condition command
-tgetent, tgetnum, tgetflag, tgetstr, tgoto, tputs (3) - terminal independent operation routines
-time (1) - time a command
-time, ftime (2) - get date and time
-times (2) - get process times
-tk (1) - paginator for the Tektronix 4014
-touch (1) - update date last modified of a file
-tp (1) - manipulate tape archive
-tp (5) - DEC/mag tape formats
-tr (1) - translate characters
-tra (1) - copy out a file as it grows
-trman (1) - translate version 6 manual macros to version 7 macros
-troff, nroff (1) - text formatting and typesetting
-true, false (1) - provide truth values
-tset (1) - set terminal modes
-tsort (1) - topological sort
-tty (1) - get terminal name
-tty (4) - general terminal interface
-ttyname, isatty, ttyslot (3) - find name of a terminal
-ttys (5) - terminal initialization data
-ttytype (5) - data base of terminal types by port
-types (5) - primitive system data types
-ul (1) - do underlining
-umask (2) - set file creation mode mask
-uncompact (1) - uncompress files
-ungetc (3S) - push character back into input stream
-uniq (1) - report repeated lines in a file
-units (1) - conversion program
-unlink (2) - remove directory entry
-update (8) - periodically update the super block
-uptime (1) - show how long system has been up
-users (1) - compact list of users who are on the system
-utime (2) - set file times
-utmp, wtmp (5) - login records
-uucp, uulog (1C) - unix to unix copy
-uudiff (1C) - directory comparison between machines
-uux (1C) - unix to unix command execution
-valloc, vfree (3) - aligned memory allocator
-vfont (5) - font formats for the Versatec
-vfork (2) - spawn new process in a virtual memory efficient way
-vgrind (1) - grind nice listings of C programs for the versatec
-vi (1) - screen oriented (visual) display editor based on ex
-vmstat (1) - report virtual memory statistics
-vp (4) - Versatec interface
-vpac (1M) - print Versatec accounting information
-vpq (1) - prints the line printer queue
-vpr (1) - Versatec printer/plotter spooler
-vprint (1) - pr to the Versatec
-vprm (1) - remove a file from the Versatec queue
-vread (2) - read virtually
-vtroff (1) - troff to the Versatec
-vwrite (2) - write (virtually) to file
-w (1) - who is on and what they are doing
-wait (1) - await completion of process
-wait (2) - wait for process to terminate
-wall (1M) - write to all users
-wc (1) - word count
-whatis (1) - describe what a command is
-whereis (1) - locate source, binary, and or manual for program
-which (1) - locate a program file including aliases and paths (\fIcsh\fR only)
-who (1) - who is on the system
-whoami (1) - print effective current user id
-write (1) - write to another user
-write (2) - write on a file
-wtmp (5) - user login history
-wump (6) - the game of hunt-the-wumpus
+sinh, cosh, tanh (3M) - hyperbolic functions
+size (1) - size of an object file
+sleep (1) - suspend execution for an interval
+sleep (3) - suspend execution for interval
+sleep (3F) - sleep for awhile
+snake, snscore (6) - display chase game
+socket (2) - create an endpoint for communication
+socketpair (2) - create a pair of connected sockets
+soelim (1) - eliminate \&.so's from nroff input
+sort (1) - sort or merge files
+spell, spellin, spellout (1) - find spelling errors
+spline (1G) - interpolate smooth curve
+split (1) - split a file into pieces
+stab (5) - symbol table types
+stat, fstat (3F) - get file status
+stat, lstat, fstat (2) - get file status
+stdio (3S) - standard buffered input/output package
+sticky (8) - executable files with persistent text
+stk, sstk (2) - change stack segment size
+strcat, strncat, strcmp, strncmp, strcpy, strncpy, strlen, index, rindex (3) - string operations
+strings (1) - find the printable strings in a object, or other binary, file
+strip (1) - remove symbols and relocation bits
+struct (1) - structure Fortran programs
+stty (1) - set terminal options
+stty, gtty (3) - set and get terminal state (defunct)
+style (1) - analyze surface characteristics of a document
+su (1) - substitute user id temporarily
+sum (1) - sum and count blocks in a file
+swab (3) - swap bytes
+swapon (8) - specify additional device for paging and swapping
+swapon, swapoff (2) - add/delete a swap device for interleaved paging/swapping
+symlink (2) - make symbolic link to a file
+symorder (1) - rearrange name list
+sync (2) - update super-block
+sync (8) - update the super block
+syscall (2) - indirect system call
+sysline (1) - display system status on status line of a terminal
+syslog (8) - log systems messages
+syslog, openlog, closelog (3) - control system log
+system (3) - issue a shell command
+system (3F) - execute a unix command
+tabs (1) - set terminal tabs
+tail (1) - deliver the last part of a file
+tar (1) - tape archiver
+tar (5) - tape archive file format
+tbl (1) - format tables for nroff or troff
+tc (1) - photoypesetter simulator
+tcp (4P) - Internet Transmission Control Protocol
+tee (1) - pipe fitting
+telnet (1C) - user interface to the TELNET protocol
+telnetd (8C) - DARPA TELNET protocol server
+term (7) - conventional names for terminals
+termcap (5) - terminal capability data base
+test (1) - condition command
+tftpd (8C) - DARPA Trivial File Transfer Protocol server
+tgetent, tgetnum, tgetflag, tgetstr, tgoto, tputs (3X) - terminal independent operation routines
+time (1) - time a command
+time, ctime, ltime, gmtime (3F) - return system time
+time, ftime (3) - get date and time
+times (3) - get process times
+tip (1C) - connect to a remote system
+tk (1) - paginator for the Tektronix 4014
+tm (4V) - TM-11/TE-10 magtape interface
+touch (1) - update date last modified of a file
+tp (1) - manipulate tape archive
+tp (5) - DEC/mag tape formats
+tr (1) - translate characters
+traper (3F) - trap arithmetic errors
+trapov (3F) - trap and repair floating point overflow
+trek (6) - trekkie game
+trman (1) - translate version 6 manual macros to version 7 macros
+troff, nroff (1) - text formatting and typesetting
+trpt (8C) - transliterate protocol trace
+true, false (1) - provide truth values
+truncate (2) - truncate a file to a specified length
+ts (4V) - TS-11 magtape interface
+tset (1) - terminal dependent initialization
+tsort (1) - topological sort
+tty (1) - get terminal name
+tty (4) - general terminal interface
+ttynam, isatty (3F) - find name of a terminal port
+ttyname, isatty, ttyslot (3) - find name of a terminal
+ttys (5) - terminal initialization data
+ttytype (5) - data base of terminal types by port
+tu (4V) -/730 TU58 console cassette interface
+tunefs (8) - tune up an existing file system
+types (5) - primitive system data types
+uda (4V) - UDA-50 disk controller interface
+udp (4P) - Internet User Datagram Protocol
+ul (1) - do underlining
+umask (2) - set file creation mode mask
+un (4V) - Ungermann-Bass interface
+ungetc (3S) - push character back into input stream
+uniq (1) - report repeated lines in a file
+units (1) - conversion program
+unlink (2) - remove directory entry
+unlink (3F) - remove a directory entry
+up (4V) - unibus storage module controller/drives
+update (8) - periodically update the super block
+uptime (1) - show how long system has been up
+users (1) - compact list of users who are on the system
+ut (4V) - UNIBUS TU45 tri-density tape drive interface
+utime (3) - set file times
+utimes (2) - set file times
+utmp, wtmp (5) - login records
+uuclean (8) - uucp spool directory clean-up
+uucp, uulog (1C) - unix to unix copy
+uuencode (5) - format of an encoded uuencode file
+uuencode,uudecode (1C) - encode/decode a binary file for transmission via mail
+uusend (1C) - send a file to a remote host
+uux (1C) - unix to unix command execution
+va (4V) - Benson-Varian interface
+valloc (3) - aligned memory allocator
+varargs (3) - variable argument list
+vfont (5) - font formats for the Benson-Varian or Versatec
+vfontinfo (1) - inspect and print out information about UNIX fonts
+vfork (2) - spawn new process in a virtual memory efficient way
+vgrind (1) - grind nice listings of programs
+vgrindefs (5) - vgrind's language definition data base
+vhangup (2) - virtually ``hangup'' the current control terminal
+vi (1) - screen oriented (visual) display editor based on ex
+vipw (8) - edit the password file with vi
+vlp (1) - Format Lisp programs to be printed with nroff, vtroff, or troff
+vmstat (1) - report virtual memory statistics
+vp (4V) - Versatec interface
+vpr, vprm, vpq, vprint (1) - raster printer/plotter spooler
+vswapon (2) - add a swap device for interleaved paging/swapping
+vtroff (1) - troff to a raster plotter
+vv (4V) - Proteon proNET 10 Megabit ring
+vwidth (1) - make troff width table for a font
+w (1) - who is on and what they are doing
+wait (1) - await completion of process
+wait (2) - wait for process to terminate
+wait (3F) - wait for a process to terminate
+wait3 (2) - wait for process to terminate
+wall (1) - write to all users
+wc (1) - word count
+what (1) - show what versions of object modules were used to construct a file
+whatis (1) - describe what a command is
+whereis (1) - locate source, binary, and or manual for program
+which (1) - locate a program file including aliases and paths (\fIcsh\fR only)
+who (1) - who is on the system
+whoami (1) - print effective current user id
+worm (6) - Play the growing worm game
+worms (6) - animate worms on a display terminal
+write (1) - write to another user
+write, writev (2) - write on a file
+wump (6) - the game of hunt-the-wumpus