Certain rules by which social intercourse is regulated among a social group, and which are founded on a regard for reputation.

(retail) An alphanumeric code used to identify the offer associated with a coupon.

The official road safety manual for the United Kingdom, covering pedestrians, animals, cyclists, motorcyclists and drivers. / The rules set forth in the Highway Code.

(US, Australia, Philippines) A prefix appended to a telephone number indicating the geographical area.

(business, espionage, military) A name used to clandestinely identify somebody or something, either for military or espionage purposes, or for commercial confidentiality.

(programming) A block of source code, often one that is delimited by brackets or in some similar way, depending on the programming language.

(British spelling) Any system where colours are used to categorize elements of sets.

(British spelling) To mark items with a colour code as a means of sorting.

(computing) Any character used to specify a function of a piece of software or hardware (such as carriage return of a printer)

A sequence of letters and/or numbers added to a postal address to aid the sorting and delivery of post/mail.