I used to think a 50MB Excel file meant I had a lot of data. I was wrong. It actually meant my workbook was a cluttered mess of hidden caches and ghost data. I managed to reclaim my storage and speed ...

Have you ever sent an Excel file to a colleague, only to realize they couldn’t open it because of compatibility issues? Or perhaps you’ve spent hours perfecting a spreadsheet, only to see its ...

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 ...