A calculator was once a necessity in any math class above elementary school. But now that smartphones are ubiquitous, everyone has a ready-to-go calculator right in their pocket. Of course, it’s not a ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Pictured above is the HP 12C Financial Programmable Calculator, available from the Hewlett-Packard website for $69.99. What makes this calculator totally unique among all consumer electronic products ...