Mastering Excel goes far beyond SUM and VLOOKUP. By learning functions like COUNT, AVERAGE, SUMIF, SUBTOTAL, XLOOKUP, and INDEX/MATCH, you can find opportunities to improve your Excel sheet. Some ...

But this was 2009, the age of mobile technology, so Newmark pulled out his iPhone, snapped a photo of the train car and, using an app called "SeeClickFix," zapped an on-the-go complaint, complete with ...