Rules or regulations relating to one subject, especially ethical codes regulated by mass media such as newspaper company or broadcasting company. / A short symbol.

(electronics) An electrical cord that transfer electricity to devices.

(music) A chord; a combination of any three or more tones.

use one thing for many purposes / work someone hard

to use one's head

source code

An extension cord.

A barcode: a set of machine-readable lines of varying width placed on products to represent pricing or other such data.

ZIP code (US postal code)

chord progression