Believe it or not, there are some retro gadgets that are even too old for us. So we must seize on them while we can, because soon the only machines that will fall into this category will be from the ...

Suppose a process line experiences motor failure every few weeks. The motor drives a grinding system that converts the raw materials from chunks to powder. After some analysis, the line’s process ...

[Michel Jean] asked a question few others might: what exactly is going on under the hood of a classic HP scientific calculator when one presses the ∫ key? A numerical integration, sure, but how ...

The early HP Reverse Polish Notation calculators have a special place in the hearts of engineers and tinkerers as there are lots of projects involving them. They haven’t been produced in decades, but ...

Anyone who enjoys retro technology is sure to like this very first HP calculator watch prototype which is now available to purchase over on the eBay auction website at a ‘buy it now’ price of $14,500.