Which company's 'Think Different' marketing campaign in the 1990s helped transform graphing calculators from niche tools to mainstream educational essentials?

The world of mathematics education has seen numerous innovative product marketing strategies over the years. From graphing calculators to educational software, companies have employed various techniques to stand out in this specialized market. Test your knowledge about a groundbreaking marketing campaign that revolutionized how a particular mathematical tool was perceived and adopted in educational settings worldwide.

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Texas Instruments with their TI-83 series
Casio with their fx-CG50 series
HP with their Prime series
Sharp with their EL-9900 series