Similar to Strings_(UNIX)

ProFTPD

Ps (Unix)

PWD

Pwd

Radioss

Rcp (Unix)

Berkeley r-commands

Roff (software)

Remote Shell

Rsync

Runit

SAMtools

Sbase

ScummVM

Sha1sum

Sleep (command)

System Management Interface Tool

Sort (Unix)

Source Code Control System

Strace

Su (Unix)

Sudo

Syslog

Syslog-ng

Tail (Unix)

Talk (software)

Tar (computing)