Texas Instruments TI-36X Pro Scientific Calculator, 16-Digit LCDTI's most advanced scientific calculator is ideal for engineers, students and professionals. MultiView display allows you to view multiple calculations at the same time while MathPrint feature shows math expressions, symbols and stacked fractions as they appear in textbooks. Input data, scroll through entries and make edits like using a graphing calculator. Toggle key converts fractions and square roots into decimals and back. Power Source(s): Battery; Solar; Display Notation: Engineering; Scientific; Number of Display Digits: 16; Display Characters x Display Lines: 16 x 4.