Superior Functionality The EL-531XBWH is a fully-functional, high quality scientific calculator that performs over 270 advanced scientific and mathematical functions.  It features a Direct Algebraic Logic function that allows students to enter the elements of an expression in the exact order they appear in the textbook.  It also utilizes a large, easy to read a 2-line display and Multi-Line Playback to make difficult scientific equations easier to solve. Perfect for Students Advanced technology and engineering gives you the pin-point accuracy you expect from Sharp Electronics. It is ideal for students studying general math, algebra, geometry, and trigonometry. In addition, it can be used for statistics, biology, chemistry, and general science. Features - 272 Functions - Increased from 183 - Large Display - 2-Line, 12 dot + 10 segment display - Direct Algebraic Logic (DAL) - Input equations exactly as shown. - New Design - Glass Black with Color Accents - Special Features - N-base Calculation (HEX,DEC,BIN,OCT,PEN) - NOT,AND,OR,XOR,XNOR,NEG - ½ Variable Statistics - Regression 6 - Drill Function (Table/drill) - Error recover (jumo to Er. Point)