An E-commerce system like Amazon, eBay, craigslist, etc., is one that allows users to buy and sell products. In this project, you will be developing a database for an e-commerce website where users can buy and sell products. There will be command-line or web interfaces to enable users to purchase products, post products for sale, etc. The main entities are customers, products, sellers and payments; although you may need additional entities like order-status, shipping and billing, taxes, etc. For meeting the project requirements, you only need command line interfaces, but you will receive extra credit for web interfaces.