The OREVA OR-750 MS is a scientific calculator designed to cater to a wide range of mathematical and statistical computations. Equipped with 401 distinct functions, it facilitates complex number calculations, statistical analyses, and matrix operations, making it an invaluable tool for students and professionals in scientific and engineering fields. The calculator features a 10-digit, 2-line dot matrix display, allowing users to view both input expressions and results simultaneously, thereby reducing errors and enhancing clarity. Its multi-replay function enables users to revisit and edit previous calculations without the need to re-enter data, streamlining the problem-solving process. Designed for portability and convenience, the OR-750 MS is powered by a reliable battery, ensuring consistent performance during extended study or work sessions. Its ergonomic design and intuitive interface make it a practical choice for those seeking a comprehensive and user-friendly scientific calculator.