Performs over 530 advanced scientific functions and utilizes WriteView Technology, a 4-line display and Multi-Line Playback to make scientific equations easier for students to solve. Ideal for students studying general math, algebra, geometry, trigonometry, statistics, biology, chemistry and general science. Normal, Stat, Drill, Complex, Matrix, List and Equation modes. Four programmable keys for quick use of user desired functions. Power Source(s): Battery; Solar; Display Notation: Numeric; Number of Display Digits: N/A; Display Characters x Display Lines: 16 x 4.