The EL-506WBBK performs over 469 advanced scientific functions with a 12-Digit (or 10 digit and 2 exponent) 2-line LCD screen and Multi-Line Playback to make scientific equations easier for students to solve. It is ideal for students studying general math, algebra, geometry, trigonometry, and calculus. In addition, it can be used for statistics, biology, chemistry, and physics. 1 and 2 Variable Statistics including Standard Deviation and Regression Analysis functions (6 Regression types) Random numbers Sin, Cos, Tan, and Inverse Hyperbolic Function and Inverse Deg/Rad/Grad Mode DRG Conversion Includes protective cover