HCN

• HCN channel, a cellular ion channel
• Highly composite number, a type of integer
• Hydrogen cyanide, chemical with the formula {{chem|H|C|N}}

• Halcyonair, a Cape Verdean airline
• Headcorn railway station, in England
• Hengchun Airport, in Taiwan

• Health Communication Network, an Australian software company
• High Country News, an American newspaper

{{disambiguation}}