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.
A fifth code digit was for the soldier's special qualification identifier (SQI), which indicated what specialized training the soldier had. If the soldier did not have an SQI, the digit was listed as 0 or was omitted. One-one is the field code for infantry, 1.1 is the sub-specialty of light weapons, and seven is the SQI for airborne training.