Computer-based readability indexes
Douglas R. McCallum, James L. Peterson · 1982
Computer-based document preparation systems provide many aids to the production of quality documents. A text editor allows arbitrary text to be entered and modified. A text formatter then imposes defined rules on the form of the text. A spelling checker ensures that each word is a correctly spelled word. None of these aids, however, affect the meaning of the document; the document may be well-formatted and correctly spelled but still incomprehensible.