I have a major problem. I was tasked with updating the inventory of the base because it is sorely out of date. My Chain of Command wants a very large amount of work done by today and while I was updating the EXCEL database one of the MSgt's in charge called for a serial # of a printer. I havn't worked that much with EXCEL before and I was under the impression that if I highlighted the colum of buildings and sorted it from a to z by pressing the button on the toolbar that that would sort not just that colum but everything else with it by what it said in that colum. I was wrong but I didn't realize it at first. I thought that the button was a shortcut to what is in the data downdrop because it looks the same. The cherry on top is that someone came in just after I'd done this and I ended up having to log off my machine. I didn't want to lose all that work I'd done since I'd last saved it so I saved it without hitting the undo button becuase at that time I hadn't realized my misteak. When I logged back in I noticed that what was supposed to say storage said whitehouse and that is when it dawned on me that I'd done a big boo-boo. My question is this. Is there any way to revert back to the database I'd saved earlier this morning? There are over 600 entries in this database and right now the only way I can see of fixing it is if I were to go by the hard copies of the forms I had my users fill out look at every single serial # and change the locations individually but that will take me a tedious amount of time and to them that is unacceptable. Can anyone please help me think of ideas?