The Casio Fx-991EX Professional Scientific Calculator For Engineering And Architecture Students Is A Portable Computer With High Performance Processor, Memory, Graphics Capability, Display Screen And More Features.

It Has An Integrated Digital Sound Card, Built-In Microphone And Speakers. It Can Be Used To Perform Math Problems Or Calculate Data.

The Casio Fx-991Ex Is Great For Everyday Use, Such As Simple Math, Algebra, Geometry, Calculus, Trigonometry, Statistics, Engineering, Physics, Chemistry And Much More. The Casio Fx-991Ex Is Also Great For Professional Use, Such As Engineering Work, Financial Calculations, Physics Formulas And More.

The Casio Fx-991Ex Can Be Used For All Types Of Purposes Such As At Home Or At Work.

Graphics Display, Sound Capabilities And Durable Design.

Over 530 Functions Include Complex Numbers, Linear Programming, Statistics And More.

Solar-Powered Battery With 5 MB Of Internal Memory.

Convenient USB Port For Data Transfer And Battery Charging.

Reverse Polish Notation (RPN) Entry Mode For Fast, Simplified Entry.

Sources & references used in this article:

A Manufacturer’s Field Support Via The Programmable Scientific Calculator by T Uzzle – Audio Engineering Society Convention 72, 1982 – aes.org

CAD (Calculator Assisted Design) of Sound Systems, Recording Studios and Architectural Acoustics Using the Programmable Scientific Calculator by JE Lanphere – Audio Engineering Society Convention 72, 1982 – aes.org

Design of integral spreadsheet calculator for engineering applications by Ç Dinçkal – Computer Applications in Engineering Education, 2018 – Wiley Online Library

Portable Scientific Calculator Has Built-in Printer by BE Musch, RB Taggart – Hewlett-Packard Journal, 1976 – keesvandersanden.nl

High precision and high speed handheld scientific calculator design using hardware based CORDIC algorithm by S Kumar, NM Sk – Procedia Engineering, 2013 – Elsevier

Learning mathematics with ES PLUS series scientific calculator by B Kissane, M Kemp – 2013 – researchrepository.murdoch.edu.au

Integrating technology into learning mathematics: the special place of the scientific calculator by B Kissane – Journal of Physics: Conference Series, 2020 – iopscience.iop.org

The Effectiveness of Using Scientific Calculator in Solving Non-Linear Equations by Newton-Raphson Method by LK Boon, GJ Yong, CT Han, TK Gaik – 2009 – Citeseer

The development of systems engineering by RC Booton, S Ramo – IEEE Transactions on Aerospace and …, 1984 – ieeexplore.ieee.org