(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.

plural of source code

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

plural of area code

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

plural of ZIP Code