If you’re working on your accounts and you need to convert all your overseas expenses into the currency you file your tax returns in, you need to know the exchange rate for the date of every expense.

Rather than scrolling through long tables of data in a worksheet, let this wizard find the value you're looking for automatically. Dennis O'Reilly began writing about workplace technology as an editor ...

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 ...