Similar to Date_(UNIX)

Portmap

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

Strings (Unix)

Su (Unix)

Sudo

Syslog

Syslog-ng

Tail (Unix)