As a youth, back before mobile phones and customer segmentation, I earned my allowance delivering orders to local customers, from the Mountain Heights corner store, a neighborhood grocery in New Haven, Connecticut. In those days, loyal customers – mostly elderly and all within a few blocks – would use the telephone to place an order for the usual array of soaps, cosmetics, and paper products. I’d earn a half dollar for my efforts. Mountain Heights had its corner of the city, while other grocers serviced their allotted section of the city. An idyllic setting.