The fx-991ES Plus 2nd Edition (Original) is a powerful scientific calculator designed for students and professionals alike. Featuring a natural textbook display, it allows users to view equations and expressions as they would appear in a textbook, making complex calculations easier to follow. This model supports 417 functions, including advanced calculations for algebra, trigonometry, calculus, statistics, and more. The calculator also includes a spreadsheet function and a table of values, offering a versatile set of tools for various academic disciplines.

Powered by solar energy with battery backup, the Casio fx-991ES Plus 2nd Edition is designed for long-lasting performance and energy efficiency. Its intuitive layout, large screen, and robust functionality make it an excellent choice for anyone needing a reliable and efficient scientific calculator.