Camera A is engaged in surveillance, while the person wearing camera B on his head is engaged in sousveillance.
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File:Store Building Flat Icon Vector.svg by User:Videoplasty, CC-BY-SA 4.0
File:Person information icon.svg by Gregor Cresnar from the Noun Project, CC-BY 3.0
File:Video camera icon.svg by User:Рытикова Людмила, CC-BY-SA 4.0
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Psiĥedelisto