This document discusses three approaches to modernizing point-of-sale systems using mobile technologies: virtual shopping, customer self-checkout verification, and automated customer checkout. Virtual shopping allows customers to scan item barcodes with their phone to add items to a cart and place orders for delivery. Self-checkout verification has customers scan items, submit their cart digitally, and verify purchases at the counter. Automated checkout similarly uses mobile scanning but then has staff package orders before counter verification. The document outlines the processes and benefits of each approach, including efficiency gains and reduced theft risk. It also discusses additional mobile app features like navigation, payments, and analytics to further enhance the shopping experience.