Sharp ELW531T 16 Digit Scientific Calculator Blue SH-ELW531TLBBL The EL-W531TL performs over 420 advanced scientific functions and utilises WriteView Technology, 4-line display and Multi-Line Playback to make scientific equations easier for students to solve. It is ideal for students studying general maths, algebra, geometry, trigonometry, statistics, biology, chemistry, and general science. Hard cover protects from scratches.