Photograph of Women Working at a Bell System Telephone Switchboard. Original public domain image from Flickr https://www.rawpixel.com/image/8765682/photo-image-vintage-public-domain-womenFree Image from public domain licenseWorkman at telephone switchboard. Shasta Dam, Shasta County, California. Various areas of construction are connected with… https://www.rawpixel.com/image/12145159/image-person-art-vintageFree Image from public domain licenseTelephone operator at the airport switchboard. Municipal airport, Washington, D.C.. Sourced from the Library of Congress. https://www.rawpixel.com/image/12325176/image-person-technology-public-domainFree Image from public domain license[Untitled photo, possibly related to: Greenville, South Carolina. Air Service Command. Enlisted men of the signal company of… https://www.rawpixel.com/image/12294863/photo-image-face-plant-personFree Image from public domain licenseGreenville, South Carolina. Air Service Command. Enlisted men of the signal company of the 25th service group operating a… https://www.rawpixel.com/image/12294861/photo-image-face-plant-personFree Image from public domain license