The Casio fx-991MS Second Edition is a powerful non-programmable scientific calculator designed for students and professionals who need reliable performance for complex math and science work. It includes all functions found on the fx-82MS, fx-85MS, and fx-350MS, and expands them with advanced capabilities such as equation solving, integration, differentiation, matrix operations, vector calculations, base-n conversions, and complex number calculations. A clear display, intuitive key layout, and a durable slide-on hard case make it ideal for classrooms, exams, and intensive daily use. With 9 variable memories, 40 built in scientific constants, and statistical tools including regression analysis and a full STAT data editor, it delivers exceptional versatility in a compact, dependable.
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