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Protocol.by is a service developed by the MIT Media Lab to inform people what the best ways of getting in touch with you are. This plugin allows you to use the embed code for your Protocol.by profile without having to modify any of your theme's php files. Once installed and activated, you don't need to worry about adding the Protocol.by javascript to your header. The only thing you need to add is <div id="protocol"></div> which can be done within any post or page without any theme modification whatsoever.