Which calculator company pioneered the retail strategy of offering free educational software and teacher training programs, revolutionizing how math technology was marketed to schools in the 1990s?

The world of mathematical tools and calculators has undergone dramatic transformations over the decades. From slide rules to graphing calculators to sophisticated software, these products have shaped how we learn and apply mathematics. This poll explores a significant retail innovation that changed how mathematics products were marketed and sold to students and professionals alike.

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Texas Instruments (with their TI-83/84 series)
Casio (with their fx-CG series)
HP (with their HP-48 series)
Sharp (with their EL series)