photo of a page out of the "Object-Oriented FORTRAN" manual, showing a language extension that is essentially Objective-C but on top of FORTRAN instead of C (photo by harlan haskins, from twitter.com/harlanhaskins/status/1133210047952015360)
https://cdn.masto.host/fduriansoftwarecom/media_attachments/files/113/676/296/903/484/889/original/5e484b0e3b665b16.jpeg