Machine-readable postal marking

Machine-readable postal marking may refer to:


 * POSTNET, Postal Numeric Encoding Technique, which encodes ZIP codes, ZIP+4 codes and (optionally) delivery points
 * Postal Alpha Numeric Encoding Technique, PLANET, barcode used by the U.S. Postal Service
 * Facing Identification Mark, a bar code designed by the U.S. Postal Service
 * Intelligent Mail barcode, replaces POSTNET and PLANET
 * Identification Code Tracking