Obidos was the name used by Amazon.com^[1] for their original page rendering engine, and appears in many of their URLs such as https://www.amazon.com/exec/obidos/ASIN/0596515162. Obidos was phased out in 2006 and replaced by the Gurupa engine.^[2] Amazon.com subsequently used the name for their building at 551 Boren Ave N, Seattle, WA 98109, United States.^[3]

It was named after the town of Óbidos in Brazil near the swiftest point on the Amazon River, which is in turn named after the town of Óbidos, Portugal.^{[citation needed]}