Which company developed the first handheld scientific calculator that could perform logarithmic and trigonometric functions, revolutionizing mathematics education in 1972?

The handheld calculator transformed mathematics education and professional work in the latter half of the 20th century. Behind these powerful devices were innovative companies competing to make mathematics more accessible to everyone. This poll explores the product development history of one of the most influential calculator brands that changed how we approach mathematical calculations forever.

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Texas Instruments with their SR-10 model
Hewlett-Packard with their HP-35 model
Casio with their fx-10 model
Sharp with their EL-8 model