Hewlett-Packard HP35s Scientific Calculator

The ultimate RPN scientific programmable calculator! Allows you to switch between RPN (Reverse Polish Notation) and algebraic entry-system logic at any time. The HP 35s is completely programmable and features a two-line display, 31 KB of memory, 100 built-in functions, and the powerful HP Solve application which allows you to solve for any variable without rewriting your equation. The HP35s also uses strong statistics functions for single and two-variable statistics, linear regression and more; it has the power to calculate inverse functions, cube root, logarithms, exponents, factorials and more; a powerful fraction mode plus fraction-to-decimal conversion; and it is permitted for use on SAT Reasoning Test, SAT Subject Tests in Mathematics Level 1 and Level 2, ACT Mathematics Test, PSAT/NMSQT, AP Chemistry/Physics, PLAN, and EXPLORE. A protective case is included.