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iRobot Roomba Discovery 2.1, sold in early 2007.; 26 August 2007; Own work; Shawnc Stock Photo - Alamy
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One Familys Blog: Roomba 900, 800, 700, 600 & 500 Series Comparison/Review (980, 960, 880, 870, 860, 790, 780, 770, 760, 650, 630, 620, 610, 595, 585, 580, 572, 570, 564, 562, 560, 555, 550/551, 535/540, 532, 530)
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