Audio plug illustration, clip art. Free public domain CC0 image. https://www.rawpixel.com/image/10110580/image-illustrations-public-domain-technologyFree Image from public domain licenseWaynoka, Oklahoma. Brakeman Jack Torbet, sitting at the window of the caboose pulling out of Waynoka, Oklahoma on the… https://www.rawpixel.com/image/12291268/photo-image-face-person-technologyFree Image from public domain license