Order Psocoptera, also known as booklice, are small, winged insects that are commonly found in homes and libraries. They have a flattened body and are usually light brown in color. Other synonyms for the Order Psocoptera include barklice, paperlice, and barkflies. They feed on fungi, algae, and dead organic material and are not known to be harmful to humans. Some species of Psocoptera are considered pests, as they can damage books and paper products. They can be controlled through proper sanitation and management practices, such as reducing humidity and maintaining clean, dry environments. The scientific name Psocoptera is derived from the Greek words psocos, meaning gnawer, and pteron, meaning wing.