CLN

CLN may refer to:

Computing and technology

 * Class Library for Numbers, a free software project
 * Computer Learning Network, a technical school (college) in Mechanicsburg, Pennsylvania; see YTI Career Institute

Politics and government

 * Certificate of Loss of Nationality, an American form
 * National Liberation Committee (Comitato di Liberazione Nazionale), the underground political entity of Italian Partisans during the German occupation of Italy

Other

 * Catamount Library Network, a library consortium in Vermont
 * Chapeltown railway station, in South Yorkshire
 * Credit-linked note, a security issued by a special purpose company or trust
 * Sri Lanka (Ceylon), ITU country code