If you used a scientific calculator in the 1970s or 1980s, there was a fair chance that it worked differently from almost every calculator you see today. Instead of typing: There wasn’t even an equals ...

The Apollo-Soyuz mission featured a remarkable pocket-sized Hewlett-Packard calculator, designed to serve as a safeguard for critical navigational calculations. Now housed at the Smithsonian's ...

For most people, calculators are cheap and simple devices used for little more than addition and the odd multiplication job. However, when you get into scientific and graphical calculators, the ...

If you spent time around an engineer in the Eighties, you probably saw that person using a Hewlett-Packard scientific calculator. One of these sits next to a pad of graph paper and a few mechanical ...