Others contain detailed essays with extensive bibliographies. There are manuals on nearly every topic, from operating equipment to proper personnel procedures. Some are supplements to encyclopedia sets, while others are statistical summaries. In some sciences, like astronomy, almanacs contain charts, tables, and lists that may not change each year. For a depiction of the earth as it was, is, and will be, find a MAP .
Maps also cover the planets, moons, and constellations.
Atlases are not only cartographical, geographical, or geological. There are atlases of mathematical functions, medical atlases of the body and its parts, and biological atlases of plants and animals. Used mostly in laboratories, guides help researchers perform tasks the same way each time, in the best and safest way possible. In addition, to library catalogs, there are catalogs or satellites, chemicals, and astronomical bodies. Libraries have union lists of materials and where they can be found.