Sharp EL-W516B Scientific Calculator with WriteView (Black) Scientific calculator with 535 different scientific functions Extra large 4-Line, 12-digit LCD display screen WriteView Technology displays formulas as they are written in textbooks Modes: Normal, Stat, Drill, Complex, Matrix, List, Equation; Ability to solve three simultaneous equations Four programmable keys for quick use of user desired functions; Ability to solve three simultaneous equations