Cauzin Softstrip was the first commercial 2D barcode format, introduced in 1985

Tech Tangents did a good video on that recently<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mIGotStRCkA" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mIGotStRCkA</a><p>The idea was you could use the scanner instead of manually typing in programs from magazines

I’m curious if this system would have some sort of checksum to know if the data was loaded correctly?<p>I guess a more general question: do barcodes have checksums? Or QR codes for that matter?