Gas or Elec is a term used to refer to the two main types of energy sources used in homes and businesses. Gas is typically used for heating, cooking, and other activities that require a flame, while electricity is used for lighting, powering appliances, and other activities that require an electrical current. Util is a four-letter word meaning 'to make use of or put to practical use.' Therefore, Gas or Elec and Util can be used together to refer to the practical use of either gas or electricity.