What is the difference between a Casio FX-85GTX and FX-991EX? Does it matter for high school? - Quora
Which scientific calculator is better for mechanical engineers, a Casio FX-991ES, a Texas instruments TI-36 X or a Casio FX115 ES? - Quora
Muridell Calculator Initiative - Which will you go for? The Nigerian market is full with scientific calculators that are counterfeit and students are facing this problem throughout institutions. At Muridell Calculator Initiative,
![FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO](https://www.casio-europe.com/resource/images/sgr/detail/fx991esplus.jpg)