Uninterruptible Power Supply

An Uninterruptible Power Supply is a device that sits between a power supply (e.g. a wall outlet) and a device (e.g. a computer) to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device.   For more information visit: http://www.apc.com/products/category.cfm?id=13&segmentID=1   http://www.liebert.com/product_pages/MainCategory.aspx?id=2