I have a co-worker who has a bunch of documents she is trying to open that are .lis files. Can someone recommend safe software that she can use to open and read these files?
No sure I think from someone in a different department
Start backtracking then to find out where the documents originated. If your co-worker knows they need to use those files, they should also know what took to use to open the files, and whoever gave the files to them should be able to provide some info if she does not.