Simes presides over Computer Pals, a volunteer-run group devoted to helping older adults develop digital literacy. Under his ...

Build flexible Excel functions that automatically handle blanks, defaults, and overrides without messy nested IFs.

Calculating sales tax on prices is something you don't have to worry about if you use Excel. You can add a formula to the spreadsheet you use for invoices, bills of sale or quotes, and that's the end ...

Glide turns an Excel spreadsheet into an inventory app; computed columns replace formulas, giving live stock-on-hand totals ...