Since OSA is a serious medical condition, it must be diagnosed by a physician. Once a diagnosis of sleep apnea is made, the severity of the dysfunction can be classified and treatment options will be given.
White House Anthrax Recommendations Remove Valuable Tool From First Responders: Technology Council Urges Review. The HDTC is a non-profit organization whose purpose is to advise government, business and the public on homeland defense technology issues.
High Level Link Control (HDLC) Protocol. The HDLC protocol is a general purpose protocol which operates at the data link layer of the OSI reference model. The protocol uses the services of a physical layer, and provides either a best effort or reliable communications path between the transmitter and receiver (i.e. with acknowledged data transfer).