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 ...

If you know that 5 Enter 4 + 2 Enter 1+ ÷ equals 3, odds are there’s an HP 12c on your desk. In the 23 years since the 12c debuted, Hewlett-Packard Co. has sold millions of the financial calculator, ...