In this document, OCR fails frequently.

In many cases, lower case "e" will be wrongly OCR'ed into "c", even when the word is a standard dictionary word: For instance "The" becomes "Thc", "references" becomes "referenccs", and "accelerations" becomes "accelcrations".

The problem increases as the photo becomes more blurry, but, in short, it means that the OCR isn't quite reliable enough for document archiving.