Which of these inventions was patented in 1999 and revolutionized e-commerce by allowing customers to purchase items with a single click?

The world of e-commerce has seen remarkable inventions and discoveries that have transformed how we shop online. From secure payment systems to innovative logistics solutions, these technological breakthroughs have shaped modern retail. This trivia question tests your knowledge about a groundbreaking invention that revolutionized e-commerce and created new possibilities for global retail.

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1-Click ordering (patented by Amazon)
Digital shopping cart (patented by NetMarket)
Secure Socket Layer encryption for payments (patented by Netscape)
Recommendation algorithm (patented by eBay)