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

gilt : Decorative patterns imbedded into the affected portion of a book. Often appears on the boards or the spine, and may be very simple, to elegant, to ludicrous.

4to : Or quarto. A term used generally to describe the approximate size of a book, a book that is about 10" to 12" tall and roughly squarish in shape. The term is based on the size of paper traditionally used by book printers which has been folded and cut into 16 pages.

f/f : Fine condition book, with fine condition dust jacket. Fine condition is defined by AB Bookman's Weekly as "approaches the condition of As New, but without being crisp. For the use of the term Fine there must also be no defects, etc., and if the jacket has a small tear, or other defect, or looks worn, this should be noted."

Cloth : Generally refers to a hardcover with cloth covering the outside of the book covers.