I do. Casio fx-991ES - for the sole reason I was an engineering student a couple of lives ago. About two years ago I started doing projects in real-space, as

I do. Casio fx-991ES - for the sole reason I was an engineering student a couple of lives ago. About two years ago I started doing projects in real-space, as opposed to software-space, and would you believe it - I do sometimes need some trigonometry! But in most cases it's easier to add a bunch of measurements on a device I can literally put on the thing I'm working on and focus on measuring (and not the simple arithmetic). And then getting the center points/lines is three button presses. Also, this device has stats mode with table input and I do use it too! Getting basic mean and std. dev. when checking CO2 levels in the greenhouse etc. But! I also bought RealCalc (or whatever's the name...) for Android to have... a spare proper calculator, really. I still prefer a dedicated physical device. Another tool in the toolbox.