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

pb : paperback

title page : A page where the title of the book, the author's name and publication information usually appear.

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.

plate : Full page illustration or photograph. Plates are printed separately from the text of the book, and bound in at production. I.e., they are not sewn as parts of gatherings.