TI'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.