Fields of Anthropology. There are now four major fields of anthropology: biological anthropology, cultural anthropology, linguistic anthropology, and archaeology. Each focuses on a different set of research interests and generally uses different research techniques.
SPC is one of the three categories of Statistical Quality Control (SQC). SQC is a statistical method of analyzing variations in the manufacturing process in order to make it better and more effective. Only a certain number of samples are needed to determine whether the products are acceptable.
Ceiling Attenuation Class (CAC) A measure of a ceiling tile's ability to block sound from traveling room to room. A ceiling tile with a CAC < 25 is considered low performance, while a CAC > 35 is high performance. CAC is important between rooms and between floors and ceilings.