Scientific calculator performs more than 330 advanced scientific functions and utilizes WriteView Technology, 4-line display and Multi-Line Playback to make scientific equations easier for students to solve. Enter and display fractions, arithmetic formulas or certain functions as you would write them. View entire formulas exactly as you see them in textbooks. It is ideal for students studying general math, algebra, geometry, trigonometry, statistics, biology, chemistry and general science. Modes include normal, stat and drill. Calculator includes four programmable keys, fraction calculation, last answer recall, logic operations and more. The hard slide cover protects the calculator so it can withstand frequent use. Calculator runs on battery power.