The guys over at Willow Garage have already proved their PR2 to be a worthy weekend companion, teaching it toplay billiards,fetch beer, and even to clean up after a party. A team of UC Berkeley researchers more interested in domestic applications for robotics has also shown that PR2 can be a handy household companion during the slower parts of the week, namelylaundry day. Now, they've shown that if you give PR2 a sock it can employ its keen ability for repetitive hand motions to that other regularly recurring chore:pairing socks! Presented with two socks, PR2 must first determine if each one is correctly oriented or if one or both are inside out.