Which calculator company famously redesigned its logo in 1978 from a simple wordmark to include the now-iconic 'wavy equals sign' that has become synonymous with advanced mathematical computing?

Product design in the mathematics industry has evolved significantly over the decades, particularly with educational tools and their branding. Calculator companies, mathematical software developers, and educational publishers have created distinct visual identities that mathematicians and students recognize worldwide. Test your knowledge about one of the most significant product design transformations in the mathematics education space!

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Texas Instruments
Casio
Hewlett-Packard
Sharp