Optical character recognition is one of those things that once seemed like magic, but will soon be so common place we will scarcely remember what things were like when we did not have it. OCR is the ability to take a picture, or a .pdf and convert it to text.
This means we can scan a document and convert it to Word, or take a picture of a book, poster, menu, food package, website, book...and convert it to editable text.
I have had mixed success with OCR Online and Free-OCR, but one usually works if the other fails and I am hopeful that the system will continue to improve. Both sites are free and neither require a log-in.