For a long time udoc was called qdoc. Because Trolltech might want to
release its qdoc (abbreviated from
qt doc tool for no particularly
good reason), it seemed sensible to rename
this one before release. A
simple matter — just step along to the next letter, I thought. But then
there turned out to be
something called rdoc already. And two
programs called sdoc. tdoc was taken too. A few quick searches showed that
there are more than 26 programs like udoc.
You can understand why I considered naming it fdoc.