Which of these describes the correct evolution of Texas Instruments' logo, the company behind the iconic TI graphing calculators used in mathematics education worldwide?

The world of mathematics has its own unique brands and products that have shaped education and research for decades. From calculators to software, these tools have distinct visual identities and histories. This poll tests your knowledge of how one of the most influential mathematical tool companies evolved its brand identity over time. Can you identify the correct journey of this iconic logo?

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Started as 'Texas Instruments Inc.' spelled out in full (1951), changed to 'TI' in red square (1970s), then to current stylized 'TI' with red line underneath (1990s)
Started as just 'TI' letters (1951), evolved to include a calculator icon (1970s), then simplified to current red and black 'TI' logo (2000s)
Originally featured a lone star symbol representing Texas (1951), changed to 'Texas Instruments' in block letters (1980s), then to current 'TI' design (2010s)
Began as 'Instruments of Texas' with calculator imagery (1951), rebranded to 'TI' with integrated circuit design (1980s), modernized to current minimalist logo (2005)