Amazon.com designs its online and physical storefronts to enable a vast selection of products to be sold by Amazon and third-party sellers across dozens of product categories, customers access its offerings through its website, mobile apps, Alexa devices, Prime Video streaming and brick-and-mortar stores, it develops and manufactures electronic devices such as Kindle e-readers, Fire tablets, Fire TV streaming devices, Echo smart speakers and Ring home-security tools and produces media content through Prime Video and AWS Studios. It serves consumers, sellers, developers, enterprises, content creators, advertisers and employees and fulfills orders through its own North American and international fulfillment centers, co-sourced and outsourced delivery partnerships, Fulfillment by Amazon services, digital delivery of content and products and its brick-and-mortar stores.