Casio fx-991 Calculator

The Casio fx-991MS is a popular scientific calculator used around the world and known for its affordability, reliability, and wide range of features. It is commonly used by:

1. Students: Particularly in middle school, high school, and early college/university, the Casio fx-991MS is often used by students studying subjects such as mathematics, physics, engineering, and economics. Its capabilities—like solving equations, calculating statistical data, and performing complex trigonometric functions—make it suitable for many math-related courses. It is also permitted for use in many exams and standardized tests, unlike graphing or programmable calculators.

2. Teachers and Educators: Teachers and professors use it in classrooms as it offers a practical, easy-to-use tool for demonstrating various mathematical concepts. Its simple design and range of functions make it an excellent choice for educational settings.

3. Engineers and Technicians: Professionals in fields like engineering, physics, and applied sciences sometimes use the Casio fx-991MS for quick calculations, especially for tasks that require scientific notation, solving equations, or performing trigonometric functions.

4. Hobbyists and Individuals: People who need a reliable scientific calculator for personal projects, such as home improvement calculations or general interest in math and science, may also use the Casio fx-991MS.