{"product_id":"casio-fx-991es-plus-2nd-edition-scientific-calculator-417-functions-black","title":"Casio fx-991ES Plus 2nd Edition Scientific Calculator - 417 Functions - Black","description":"\u003ch2\u003eBuy Casio fx-991ES Plus 2nd Edition Scientific Calculator Black in Qatar | Doha | TechBay\u003c\/h2\u003e\u003cp\u003eThe Casio fx-991ES Plus 2nd Edition is the most advanced non-programmable scientific calculator in Casio's ES Plus series — featuring 417 functions, significantly more than the fx-95ES Plus (274) and fx-82ES Plus (252). With Natural Display, dual solar + battery power, and advanced functions including integration, differentiation, matrix calculations, vector calculations, and equation solving, it is the ideal scientific calculator for Qatar and GCC university students in mathematics, engineering, physics, and science programs who need maximum function coverage in a non-programmable, exam-compliant calculator.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e417 Functions — Most Advanced ES Plus Model:\u003c\/strong\u003e 417 mathematical functions — the highest function count in Casio's ES Plus series, significantly more than the fx-95ES Plus (274) and fx-82ES Plus (252) — covering advanced university-level mathematics, engineering, physics, and science topics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Calculation Modes:\u003c\/strong\u003e Includes integration (∫dx), differentiation (d\/dx), matrix calculations, vector calculations, complex number calculations, equation solving, and base-n calculations — essential functions for Qatar university students in engineering, mathematics, and science programs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural Display (Natural-V.P.A.M.):\u003c\/strong\u003e Casio's Natural Display technology shows mathematical expressions in natural textbook format — fractions, roots, powers, integrals, derivatives — exactly as written in textbooks for accurate input and verification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-Programmable:\u003c\/strong\u003e Non-programmable design ensures compliance with examination regulations that prohibit programmable calculators — suitable for use in Qatar university examinations (verify with your institution's approved calculator list).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar + Battery Dual Power:\u003c\/strong\u003e Dual power (solar + battery backup) for reliable operation in all lighting conditions — no risk of the calculator dying during Qatar university examinations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2nd Edition:\u003c\/strong\u003e Updated 2nd Edition with additional functions and improvements over the original fx-991ES Plus.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDetailed Technical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Casio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e fx-991ES Plus 2nd Edition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e 417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Natural Display (Natural-V.P.A.M.), LCD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay Lines:\u003c\/strong\u003e Refer to official Casio spec sheet for display line count\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable:\u003c\/strong\u003e No (non-programmable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Functions:\u003c\/strong\u003e Integration, differentiation, matrix, vector, complex numbers, equation solving, base-n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e Solar + battery (dual power)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions \u0026amp; Weight:\u003c\/strong\u003e Refer to official Casio product page for exact measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Refer to official Casio product page (slide-on hard case typically included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e As per Casio standard warranty policy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Qatar Shoppers Are Buying It\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e417 functions make the fx-991ES Plus 2nd Edition the most capable non-programmable scientific calculator in Casio's ES Plus series — covering advanced university-level mathematics, engineering, and science topics that the fx-82ES Plus and fx-95ES Plus cannot handle.\u003c\/li\u003e\n\u003cli\u003eIntegration and differentiation functions are essential for Qatar university students in calculus, engineering, and physics programs — enabling direct calculation of integrals and derivatives without manual computation.\u003c\/li\u003e\n\u003cli\u003eMatrix and vector calculation modes are critical for Qatar university students in linear algebra, engineering mathematics, and physics — functions not available on the fx-82ES Plus or fx-95ES Plus.\u003c\/li\u003e\n\u003cli\u003eNon-programmable design ensures compliance with Qatar university examination regulations that prohibit programmable calculators — a safe, exam-compliant choice for Qatar university students.\u003c\/li\u003e\n\u003cli\u003eDual solar + battery power ensures the calculator never runs out of power during Qatar university examinations — eliminating the risk of battery failure at a critical moment.\u003c\/li\u003e\n\u003cli\u003eAvailable for fast delivery across Qatar including Doha, Al Rayyan, and Al Wakrah through TechBay.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the Casio fx-991ES Plus 2nd Edition, fx-95ES Plus 2nd Edition, and fx-82ES Plus 2nd Edition?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eAll three are non-programmable ES Plus 2nd Edition scientific calculators with Natural Display and dual solar + battery power. The key difference is function count and advanced capabilities: fx-991ES Plus has 417 functions including integration, differentiation, matrix, and vector calculations; fx-95ES Plus has 274 functions; fx-82ES Plus has 252 functions. Choose the fx-991ES Plus for university-level mathematics and engineering; choose the fx-95ES Plus or fx-82ES Plus for secondary school use.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the Casio fx-991ES Plus 2nd Edition and the newer fx-991CW?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe fx-991CW is the latest ClassWiz generation with a higher-resolution display, more intuitive menu navigation, QR code function, spreadsheet mode, and 550+ functions. The fx-991ES Plus 2nd Edition has 417 functions with the proven ES Plus Natural Display interface. Choose the fx-991CW for the latest ClassWiz features and maximum function count; choose the fx-991ES Plus 2nd Edition if your university recommends the ES Plus series or if you prefer the familiar ES Plus interface.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the Casio fx-991ES Plus 2nd Edition support integration and differentiation?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, the fx-991ES Plus 2nd Edition supports numerical integration (∫dx) and differentiation (d\/dx) — essential functions for Qatar university students in calculus, engineering mathematics, and physics programs. These advanced functions are not available on the fx-82ES Plus or fx-95ES Plus.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs the Casio fx-991ES Plus 2nd Edition approved for use in Qatar university examinations?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe fx-991ES Plus 2nd Edition is non-programmable and widely used in Qatar and GCC universities. However, approved calculator lists vary by institution and examination board. Qatar students should verify with their university that the fx-991ES Plus 2nd Edition is on the approved calculator list before purchasing for examination use.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the Casio fx-991ES Plus 2nd Edition support matrix and vector calculations?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, the fx-991ES Plus 2nd Edition supports matrix calculations (up to 3×3 matrices) and vector calculations — essential for Qatar university students in linear algebra, engineering mathematics, and physics programs. These functions are not available on the fx-82ES Plus or fx-95ES Plus.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the best scientific calculator for university students in Qatar?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Casio fx-991ES Plus 2nd Edition is the most capable non-programmable ES Plus scientific calculator for Qatar university students in mathematics, engineering, physics, and science programs — with 417 functions, integration, differentiation, matrix, and vector calculations in a proven, exam-compliant design. For the latest ClassWiz features, the fx-991CW is the newer alternative.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhere can I buy the Casio fx-991ES Plus 2nd Edition in Doha, Qatar?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Casio fx-991ES Plus 2nd Edition Scientific Calculator Black is available online at TechBay with fast delivery across Qatar including Doha and surrounding areas.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003ch3\u003ePerfect For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversity Students in Qatar:\u003c\/strong\u003e Qatar university students in mathematics, engineering, physics, and science programs across Doha and the GCC who need the most advanced non-programmable ES Plus scientific calculator — with 417 functions, integration, differentiation, matrix, and vector calculations for comprehensive university curriculum coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Secondary School Students in Qatar:\u003c\/strong\u003e Qatar advanced secondary school students preparing for university-level mathematics and science who want a calculator that will serve them through both secondary school and university without needing to upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eES Plus Series Upgraders in the GCC:\u003c\/strong\u003e Qatar students who currently use the fx-82ES Plus or fx-95ES Plus and need to step up to the most advanced ES Plus model for university-level mathematics and engineering — the fx-991ES Plus 2nd Edition is the top of the ES Plus series available at TechBay.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Casio","offers":[{"title":"Default Title","offer_id":52491901436206,"sku":"FX-991RS PLUS","price":99.0,"currency_code":"QAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9330\/9998\/files\/b3f6b67e-0bc0-4149-aaa8-c7d5fe8419d3_FX991ESPLUS2.png?v=1787517021","url":"https:\/\/techbayqatar.com\/ar\/products\/casio-fx-991es-plus-2nd-edition-scientific-calculator-417-functions-black","provider":"TechBay","version":"1.0","type":"link"}