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The sidewalk and it needs to be aware of the surroundings. >> reporter: how does it get to the warehouse from the person's house? >> we're doing our own mapping. the maps that our robot needs are quite special. they are more sidewalk maps than the road maps. ♪ >> reporter: excuse me, sir, can you help me? i'm trying to steal a robot. theft deterrents include gps tracking and cameras. each unit just isn't that valuable, he says. >> the most expensive part in the robot is about $40. and that's actually the point of it. it has to be a low-cost machine. >> reporter: and he says your groceries ar...
Source: archive.org