The very first Amazon Go store outside of Seattle is getting set to open its doors. The technology giant said it will start a store in downtown Chicago Monday afternoon, following upon a strategy disclosed earlier this year to expand the notion of locations in Chicago and San Francisco. The 2,000-square-foot Chicago store, in 113 S. Franklin St., is your fourth largest Amazon Go location overall, together with another three in Seattle. After spending years developing the technologies behind the store, and another year analyzing it with Amazon workers, the technology giant is starting to move quicker in enlarging Amazon Go. The original store opened in January in the bottom of Amazon’s Day One officer tower. The next store in the Madison Centre office building in downtown Seattle started three months ago. Store number three started two weeks ago in among Amazon’s office buildings in 300 Boren Ave. N. from the South Lake Union neighborhood. The store relies heavily on the Amazon Proceed smartphone program. Clients scan a exceptional QR code within the program before passing through a set of glass doors, like the gates Amazon workers undergo when entering their office buildings each morning. A huge selection of overhead cameras and weight sensors in the shelves automatically track what individuals pick up and choose from the store. When clients leave, they just walk out. Amazon Go’s systems automatically debit their accounts for the things they choose, sending the receipt to the program. By logging shoppers in at the entry, then monitoring their activities in the store, the system eliminates the need for traditional checkout registers and checkout workers alongside them. Each store features a mix of grab-and-go breakfast, lunch and dinner alternatives such as salads and sandwiches. Also prominent in Amazon Go shops are Amazon Meal Kits and a few supermarket staples.