OSALO Scientific Calculator (401 functions) for students - OS-991MS

With a 2-line LCD, the OSALO OS-991ES PLUS Scientific Calculator manages 12-digit strings for complex operations. It executes 417 functions including trigonometry, logarithms, and linear regression. This version increases the function count from 401 to 417 over the OS-991ES. Updated internal logic speeds up matrix and vector solving for engineering students.

Key Features

1. 417 Mathematical Functions: Integrated trigonometry, statistics, and complex number operations. Solves advanced engineering problems without manual derivation.
2. Dual Power Source: Integrated solar panel and battery backup system. Prevents data loss during sudden load shedding.
3. V.P.A.M. Logic: Natural display format for fractions and square roots. Reduces input errors during high-speed calculations.
4. Equation Solver: Dedicated modes for matrix, vector, and polynomials. Cuts calculation time during competitive admission tests.
5. Official Warranty: 1-year coverage from the manufacturer. Provides hardware support if the device malfunctions.

Frequently Asked Questions

Is OSALO calculator allowed in HSC exam?

Education boards typically permit non-programmable scientific calculators like this model for HSC exams. Verify specific center rules before the exam date.

How to change battery in OSALO 991ES?

Unscrew the back panel to replace the internal LR44 button cell. The solar panel handles primary power in bright environments.