12-Digit, two-line display advanced D.A.L. scientific calculator features 419 functions that are ideal for professionals and college students. Direct algebraic logic lets you enter elements in exact order they appear in textbooks. 12-digit, 2-line display so you get one-line equation and one-line numeric. Offers multi-line playback and editing, two variable statistics, binary/octal/hexadecimal calculations, differential and integral calculus and fraction calculations. Nine independent memories. Continuous calculation. Solar and battery power. Attached hard cover.