All Wal-Marts would get to remain open with cash registers operating instead of having to deal with scattershot closings and lost business because of blackouts.

The term MICROS is an acronym for Modular Integrated Cash Register Operating Systems.

If a filling station allows customers to pay at the register, the data from the dispensers is transmitted wirelessly to the point of sale, usually inside the filling station's building, and fed directly into the station's cash register operating system.