Which consumer product company first introduced the affordable electronic pocket calculator that revolutionized mathematics education in the 1970s?

The handheld calculator transformed mathematics education and professional computation in the 20th century. What began as bulky, expensive machines evolved into affordable tools that democratized mathematical computation. This poll tests your knowledge about a pivotal moment in calculator product history that changed how we approach mathematics in education and professional settings.

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Texas Instruments with the TI-2500 Datamath (1972)
Hewlett-Packard with the HP-35 (1972)
Casio with the Casio Mini (1972)
Sharp with the EL-8 (1970)