An in-between message, for no special purpose, if not for showing another digital manifestation of an otherwise rather physical typewriter collection:
The Quick Response Code (QRC) was developed for Toyota Motor Corporation in 1994 to track vehicles during manufacture. For reading them, you need to install a QRC reader app, which is easy and mostly free of charge. You can also create your own QR code easily and for free (e.g. at http://goqr.me/).