Oldest first. Sources: Wikipedia, Wikidata.ยท Interborough Rapid Transit Company on Wikipediaยท Logo: Unknown author Unknown author, Public domain. Photos from Wikimedia Commons.Logos come from Wikimedia Commons (a few are the icon from the companyโs own website). Most are public domain as simple text or shapes, but they remain trademarks of their owners and are shown only to identify the maker or operator. All operators.