The word PHOTOGRAPHS is a general designation for any photographic process. The narrower terms include both physical media and genre categories.
Editorial note
Whenever possible, use a more specific term. The basic narrower terms are AMBROTYPES, DAGUERREOTYPES, NEGATIVES, PHOTOGRAPHIC PRINTS, and TINTYPES. When using a genre term that includes the word PHOTOGRAPHS, also index under a more specific physical process name, if desired. Used in a note under DIGITAL PRINTS and INKJET PRINTS.