Which iconic calculator company changed its logo in 1978 from a mechanical calculator design to a more modern look with the company name spelled in a distinctive font where the 'T' and 'I' were connected?

Mathematics education has been shaped not just by theories and formulas, but also by the tools and companies that help students learn. One of the most recognizable brands in mathematical education underwent a significant logo redesign that reflected the evolution from purely mechanical calculation to digital computation. This poll tests your knowledge of corporate identity in the world of mathematical tools.

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Texas Instruments
Casio
Hewlett-Packard
Sharp Electronics