I'm going to have to disagree on "qw" becuase it doesn't support comments. If it treated a line that begins with a pound sign as a comment then it would be really useful, but since it doesn't, it's just too annoying when I want to comment out some entries. I suppose if you had a static list that you knew you were never going to change then it would be fine, but as a systems engineer I don't run into that situation very often (except for really short single line lists).