1. Biological specimens: These are samples taken from living organisms such as animals, plants, or microorganisms for the purpose of scientific research. Biological specimens can include blood, tissue samples, cells, DNA, and more. 2. Geological specimens: These are rocks, minerals, fossils, and other materials collected from the Earth's surface or subsurface for study. Geological specimens help researchers understand the history of the Earth, its processes, and its resources. 3. Archaeological specimens: These are artifacts, human remains, tools, and other objects recovered from archaeological sites. Archaeological specimens provide insights into past human societies, cultures, and behaviors. 4. Botanical specimens: These are plant samples that are collected, preserved, and studied for research purposes. Botanical specimens can include pressed plants, seeds, pollen, and other plant materials. 5. Zoological specimens: These are samples from animals, such as skins, bones, feathers, or taxidermy specimens, collected for scientific study. Zoological specimens help researchers understand the biology, behavior, and evolution of various animal species.