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.

(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 later variant of Baudot code.

(UK politics) A code of conduct for government ministers in the United Kingdom.

simple past tense and past participle of zip code

(Canada, medicine) An incident where a person acts violently.

Rule according to which a man shouldn't get involved with a woman whom his friend has previously shown interest in.

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

plural of postage code