An (often handwritten) alphanumeric matrix proving paid postage, used in place of postage stamps.

A later variant of Baudot code.

(computing, transitive) To create by coding or programming.

(aviation) A zero-padded 12-bit binary code, a modified Gray code, used to transmit uncorrected barometric altitude between an encoding altimeter or analog air data computer and a digital transponder.

A set of rules on design of buildings and public spaces.

(China) A QR code identifying someone's risk level during the COVID-19 pandemic in the PRC, colored in green, yellow, or red in increasing danger.

(computing) A code that uses the binary digits (1 and 0), usually in groups of eight, to represent characters, machine instructions or other data.

A three-letter designation assigned by ISO standard 4217 denoting a given currency.

short alphabetic or numeric identifier assigned to a language.

A short alphabetic or numeric geographical code representing a specific country or area.