Tome markers are a type of bookbinding tool used to mark pages in a book. They are typically made of metal or plastic and come in a variety of shapes and sizes. The term 'Tome Markers' is often used to refer to the four-letter word 'TABS', which are small tabs that can be attached to the edge of a page to mark its location. These tabs are often used to quickly locate a specific page in a book, making them a useful tool for readers.