Most Mesopotamian artifacts are in museums and collections around the world.
Cuneiform mathematical tablets are often referred to by their museum catalog numbers, such as YBC 7289. This reference consists of one or more letters or a word, typically referring to the museum or collection in which the tablet is to be found, and the number by which it is catalogued in that collection. For example, the tablet YBC 7289 is in the Yale Babylonian Collection and is object number 7289 in their catalog, while the tablet Plimpton 322 is the object numbered 322 in the catalog of the George A. Plimpton Collection of the Rare Book and Manuscript Library at Columbia University. Below is a list of the more common museum codes and their explanation.