Preferred Model for Quick Number Crunching

[lrdheat]

HP 30b (I use RPN mode) is convenient for most small number crunching problems, display is quite readable from a variety of angles, keys are good, 6 stat models. For more sophisticated problems, my HP 42S is a go to. Less friendly as far as viewing angles go to read the display. Keys are great. Both units are perfect size for a shirt pocket. For graphing, I like the CASIO fx-CG 50, love that one can have each grid line on a graph labeled. A larger device, but works for a pants pocket. The CASIO fx-991-CW packs a lot into a small package, uses 17-21 significant digits in its calculations, requires using menus a bit more than the 42S. Shirt pocket size, but is prone to fall out of a shirt pocket, better in a pants pocket.