Reddit reviews Sharp EL-W516TBSL 16-Digit Advanced Scientific Calculator with WriteView 4 Line Display, Battery and Solar Hybrid Powered LCD Display, Black & White, Black and Silver, Model Number: ELW516TBSL
We found 2 Reddit comments about Sharp EL-W516TBSL 16-Digit Advanced Scientific Calculator with WriteView 4 Line Display, Battery and Solar Hybrid Powered LCD Display, Black & White, Black and Silver, Model Number: ELW516TBSL. Here are the top ones, ranked by their Reddit score.
Large 16 Digit, WriteView 4 Line LCD Display7 Modes: Normal, Stat, Drill, Complex, Matrix, List & Equation with 640 FunctionsHome Key Allows Users To Start Fresh From Any ScreenQuadratic & Cubic Equation Solvers and 3 Variable Linear Equation SolversDurable, Gloss Black FInish with Silver Accents and Protective Hard Case
As a working engineer, I disagree. In my opinion the TI-36X Pro is slightly harder to use and less suited for engineering that the fx-991EX (which also allows you to easily grab and use previous expressions and answers). Not that the TI is in any way bad, but I think the Casio is somewhat better.
$17.28 for the Casio
https://www.amazon.com/dp/B00ZZ93346/
18.57 for the TI
https://www.amazon.com/dp/B004NBZB2Y/
Another good choice:
Sharp EL-W516TBSL at $20.49
https://www.amazon.com/dp/B06XS6V17P
None of these are bad choices, but I think the Casio is the best.
If you only need a scientific calculator, the Sharp W516X / BSL has 4 assignable buttons at the top (D1-D4) ;) Plenty of room there to stick your own labels on (there is a newer model available too, but the D1-D4 custom keys have been moved down with the rest of the others).