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2. Xerography - Wikipedia

   en.wikipedia.org/wiki/Xerography

   Xerography is a dry photocopying technique. [1] Originally called electrophotography, it was renamed xerography—from the Greek roots ξηρός xeros, meaning "dry" and -‍γραφία-‍graphia, meaning "writing"—to emphasize that unlike reproduction techniques then in use such as cyanotype, the process of xerography used no liquid chemicals.

3. Printer (computing) - Wikipedia

   en.wikipedia.org/wiki/Printer_(computing)

   Printer steganography is a type of steganography – "hiding data within data" [30] – produced by color printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox [31] brand color laser printers, where tiny yellow dots are added to each page. The dots are barely visible and ...

4. Canon Inc. - Wikipedia

   en.wikipedia.org/wiki/Canon_Inc.

   Canon Inc. (Japanese: キヤノン株式会社; [note 1] Hepburn: Kyanon kabushiki gaisha) is a Japanese multinational corporation headquartered in Ōta, Tokyo, specializing in optical, imaging, and industrial products, such as lenses, cameras, medical equipment, scanners, printers, and semiconductor manufacturing equipment.