Sometimes computers and cache registers in a foodmart are connected to a UPS system. What does UPS mean?

Sometimes computers and cache registers in a foodmart are connected to

1.	Sometimes computers and cache registers in a foodmart are connected to a UPS system. What does UPS mean?
Answer» An uninterruptable power supply (UPS) is a backup power supply, such as a battery, that provides emergency power in the event that power is lost from the main supply.