Which calculator company first introduced the 'Natural Display' technology that shows mathematical expressions (fractions, exponents, etc.) exactly as they appear in textbooks?

The development of calculators transformed mathematics education and professional practice. From bulky mechanical devices to sophisticated graphing calculators, these tools have shaped how we learn and apply mathematical concepts. This poll tests your knowledge about a significant innovation in calculator technology that changed how mathematics was taught in classrooms worldwide.

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Texas Instruments with their TI-Nspire series
Casio with their Natural V.P.A.M. technology
HP with their Prime graphing calculators
Sharp with their WriteView technology