Those of us over a certain age will remember using paper lookup tables for logarithms or trigonometry functions. Those who are younger will have been exposed to lookup tables in their programming ...

One of the most common requests I receive from users is how to identify duplicate and unique values in Microsoft Excel. The easiest way I know is to apply a conditional format. In a nutshell, a ...

Have you ever opened an Excel file and felt a pang of unease? Rows upon rows of data, cryptic formulas sprawled across cells, and a tangle of manual formatting that seems one misstep away from chaos.