This web site concerns a Cystic Fibrosis Aging Project which will focus on the scope of the problems related to growing old with CF and suggest preparing for that as yet unknown future. The few available clues suggest that the future for older CF patients cannot be entirely predicted by observations of children and young adults. Knowledge concerning the future for aging CF patients will require the collaborative efforts of Adults with CF, CF Center Directors, Epidemiologists, Database experts, Cystic Fibrosis Worldwide, national CF foundations and funding organizations.