OCR - sgml/signature GitHub Wiki
How-to
- https://www.makeuseof.com/tag/top-5-free-ocr-software-tools-to-convert-your-images-into-text-nb/
- https://cloud.google.com/blog/products/gcp/experience-googles-machine-learning-on-your-own-images-voice-and-text
- https://help.archive.org/hc/en-us/articles/360001820212-How-to-upload-scanned-images-to-make-a-book
- https://en.wikisource.org/wiki/Help:Internet_Archive