Uninterruptible Power Supply. It is a set of or single battery, that gives you some extra time to power down the PC etc, should the mains power go off. Trevnal ----- Original Message ----- From: "Judith" <jtb@xxxxxxxxxxxxx> What is a UPS? Judith For my older friends, I put the UPS on the desk, right up front. MJH To unsub or change your email settings: //www.freelists.org/webpage/pctechtalk To access our Archives: http://groups.yahoo.com/group/PCTechTalk/messages/ //www.freelists.org/archives/pctechtalk/ For more info: //www.freelists.org/cgi-bin/list?list_id=pctechtalk