DJ : Short for dust jacket, a protective and often decorative wrapper, usually made of paper which wraps around the binding of a book.

acceptable : A non-traditional book condition description that generally refers to a book in Good or Very Good condition, although no standard exists for this term, and the word can be used to describe a wide variety of actual book conditions.

shelf wear : Minor wear resulting from a book being place on, and taken from a bookshelf, especially along the bottom edge.