Any of a series of three-letter codes (often abbreviations) for counties and similar administrative units of the British Isles used especially in the field of genealogy

plural of building code

A two-dimensional barcode, typically used to link to a website.

plural of coupon code

plural of Q code

(radio) code used as a shorthand for common messages, consisting of sequences all beginning with Q / (radio) specific code from the aforementioned set

plural of Q-code

Alternative spelling of Q code

(radio) A code used to express the quality of a radio signal being received, standing for Readability, Strength and (for nonvoice communication) Tone.

(computing) code that can never be reached during program execution because no part of the program calls it or branches to it.