Texas Instruments TI 30 XS MultiView Pocket Scientific Calculator
4-line, 16-character display; scroll, review and edit current or previous entries; pull-down menus
Enter and view calculations in common Math Notation via MATHPRINT mode, including symbolic pi
Also stacked fractions, exponents and exact square root; toggle key to view fractions/decimals
Explore (x,y) table of values for a given function, automatically or by entering x values