http://www.macnn.com/articles/02/02/08/project.backer/
Project Backer 1.01 tracks document changes
updated 10:25 am EST, Fri February 8, 2002
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MacZ Software has released Project Backer 1.0.1, a project backup application, which generates backup copies of your files automatically while you are working on them: "If you overwrite something you weren't supposed to overwrite, just go back to a copy that Project Backer has saved for you. The app even timestamps the backup copies."
