Applications for the general public [[File:SOS.svg|thumb|left|250px|Representation of Morse code ' An important application is signalling for help through SOS, "". This can be sent many ways: keying a radio on and off, flashing a mirror, toggling a flashlight, and similar methods. The SOS signal is not sent as three separate characters; rather, it is a prosign {{sc|'}}, and is keyed without gaps between characters.
Applications for the general public [[File:SOS.svg|thumb|left|250px|Representation of Morse code ' An important application is signalling for help through SOS, "". This can be sent many ways keying a radio on and off, flashing a mirror, toggling a flashlight, and similar methods. The SOS signal is not sent as three separate characters; rather, it is a prosign {{sc|'}}, and is keyed without gaps between characters.