You might be interested in this superuser question: https://superuser.com/questions/415451/how-to-transfer-a-file-over-pen-and-paper-with-error-correction https

You might be interested in this superuser question: https://superuser.com/questions/415451/how-to-transfer-a-file-over-pen-and-paper-with-error-correction https://superuser.com/questions/415451/how-to-transfer-a-fil... I was thinking forward error correction would make interactivity unnecessary.