Sony Aibo Robot Dog (1999-2006)
Sony's robodog has moved on to virtual-pet heaven, but it's still one of the sleekest nonhuman companions ever constructed. From its built-in camera to its ability to recognize 100 voice commands and its groundbreaking artificial-intelligence core, the Aibo was one sleek hound.
It reached number 44 on [[xref:http://www.pcworld.com/article/123950-6/the_50_greatest_gadgets_of_the_past_50_years.html|PC World's list of the top 50 gadgets of all time|The 50 Greatest Gadgets of the Past 50 Years]]. Sony finally euthanized its cyberpup in 2006.