A What is a Uninterruptible power supplies?

A UPS is a device to ensure supply of electricity to IT systems (computer etc) in case the mains electricity is cut off, to give the user time to back up work.

Uninterruptible Power Supply (UPS) is a device that being used to secure the stability of power supply for the protected equipments (which are mostly IT equipments like computers and servers). If there has no UPS, sudden fluctuations of the utility power (so called raw power) will affect the business operation.