Which pioneering invention from the early 2000s is credited with first making large-scale retail sentiment analysis commercially viable?

Inventions that transformed how businesses understand consumers have revolutionized retail strategy. Among these innovations, sentiment analysis technology stands as a pivotal discovery that changed how companies interpret customer feedback and market trends. This poll tests your knowledge about the origins of retail sentiment analysis tools and their initial impact on product development cycles.

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The Natural Language Toolkit (NLTK) released in 2001, which provided the first open-source libraries specifically designed for sentiment classification in retail reviews
IBM's Retail Analyzer (2004), which used proprietary algorithms to categorize customer emotions but required specialized hardware
The Customer Sentiment Indexer (CSI) patented in 2003, which relied on manual input from trained psychologists to calibrate machine learning
Amazon's internal ReviewMiner system from 2005, which was kept proprietary until its public API release in 2010