He carries around video equipment, cameras and audio recorders to capture his conversations, commutes, trips and experiences.

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The lesson for all politicians and anyone else making statements that could be embarrassing is simple: in this era of access to incredibly good audio and video recorders by everyone that carry a smartphone or tablet, it would probably be wise to be very careful not to make off-the-cuff candid remarks, especially if you are running for president.

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The proliferation of smartphones and tablets that became very useful mobile recorders for images, audio and video has exponentially accelerated the structured data creation.

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It provided cameras, watches and audio equipment, including Bose loudspeakers and Revox tape recorders.

CNN: Klaus Heymann profile