Amazon com Inc

How Amazon's One-Click Online Ordering System Works

Amazon's 1997 patent describes a method for buying an item online with just one click, by using previously stored customer and payment information, bypassing the traditional multi-step shopping cart process.

Amazon's 'Customers Also Bought' — The Recommendation Algorithm That Changed Retail

Amazon's 2001 patent describes item-to-item collaborative filtering — the 'customers who bought this also bought' algorithm that generates personalized recommendations in real time, responsible for an estimated 35% of Amazon's revenue.