Dennis O'Reilly began writing about workplace technology as an editor for Ziff-Davis' Computer Select, back when CDs were new-fangled, and IBM's PC XT was wowing the crowds at Comdex. He spent more ...

The Excel Workbooks, Excel Add-ins, and screencasts on this site will be updated and corrected regularly so head there if you are merely looking for the latest versions of a file. As far as mistakes ...