AutoStore is a modular, highly-automated e-commerce fulfillment system that can be placed almost anywhere for in-store grocery micro-fulfillment. AutoStore provides what is said to be the highest density of cubic space utilization of any automated storage and pick system. For example, 15,000 SKUs can be stored within 6,500 square feet. AutoStore consists of a 3-dimensional aluminum grid system of self-supporting bins that are moved to pick stations by independently-operating robots. Each robot has two sets of wheels that enable it to move along perpendicular axes. This makes it possible for all robots to reach any position and any bin on the grid independently.