ODN

ODN may refer to:

• Optical Distribution Network, the physical fibre and optical devices that distribute signals to users in a telecommunications network.
• Ordnance Datum Newlyn, the mean sea-level height datum in Great Britain.
• CpG Oligodeoxynucleotide also known as a CpG ODN, a molecule with immunostimulatory properties.
• Open DOS Navigator, an orthodox file manager for DOS
• Orbital Data Network, a public safety satellite network.