When average Americans confront the complicated problem of how much to save for retirement, they often use so-called “rules of thumb,” or greatly-simplified approaches, to figure out how much to save ...

We’ve been talking a lot about retirement calculators lately, but how do you pick a good one? A Web search for “retirement calculator” will bring you all kinds of free, online tools. But not all of ...

Pictured above is the HP-35, Hewlett-Packard’s first pocket calculator and the world’s first scientific pocket calculator. The HP-35 was available from 1972 to 1975, and retailed then for $395 (more ...