UPS is an abbreviation for Uninterruptible Power Supply or Uninterruptible Power Source. That is a battery that is used to power your personal computer or a hosting server to prevent the loss of data when the main power supply fails for some reason or becomes risky. A diesel generator basically self-explanatory. UPSs and generators are used as a backup in data centers to back up the power supply and to ensure the constant functioning of all of the machines located there. Due to the fact that the UPS works constantly, it offers the desired power for the machines to remain working until the generator starts and takes over. Using this type of a backup is crucial for any data center or hosting company that wants to keep their hardware and data intact in case there is a power surge or outage, as it offers them ample time to react until the issue is resolved and the primary power supply is restored.