The subject of technology is treated in a number of articles. For general treatment, see technology, history of; hand tool. For description of the materials that are both the object and means of manipulating the environment, see elastomers; industrial ceramics; industrial glass; metallurgy; mineral deposit; mineral processing; mining; plastic. For the generation of energy, see energy conversion; coal mining; coal utilization; petroleum production; petroleum refining. For treatment of food production, see agriculture, history of; agricultural economics; beekeeping; beer; cereal farming; coffee; commercial fishing; dairy farming; distilled spirit; food preservation; fruit farming; livestock farming; poultry farming; soft drink; tea; vegetable farming; wine.