What does HBCO stand for?

Carboxyhemoglobin

Carboxyhemoglobin or carboxyhaemoglobin is a stable complex of carbon monoxide and hemoglobin that forms in red blood cells upon contact with carbon monoxide. Exposure to small concentrations of CO hinder the ability of Hb to deliver oxygen to the body, because carboxyhemoglobin forms more readily than does oxyhemoglobin. CO is produced in normal metabolism and is also a common chemical.

Harvard Barobue Chamber Orchestra

Hungarian Broadcasting Torp.

Holmium Barium Copper Oxide