The term 'Ampère' is a UNIT of measurement for electric current, named after the French physicist Andre-Marie Ampère. It is abbreviated as 'A' and is equal to one coulomb per second. The related UNIT of measurement for electrical resistance is the ohm, which is abbreviated as 'Ω' and is equal to one volt per ampere. The city of Lyon, France, is also associated with Ampère, as it was his birthplace and the site of his first laboratory. The city is sometimes referred to as 'Lyon' or 'Lyons' in reference to Ampère. Finally, the term 'REL' is an abbreviation for the French phrase 'regulateur electrique lyonnais, ' which translates to 'Lyon electric regulator.' This was a device invented by Ampère in 1820 to measure electric current.