The primo example of a device that is completely cloud-centric is the Chromebook. These laptops have just enough local storage and power to run Chrome OS, which essentially turns the Google Chrome web browser into an operating system. With a Chromebook, almost everything you do is online: apps, media, and storage are all in the cloud. Because of that, they tend to be inexpensive and that's made them incredibly popular for education. The latest, made since 2017, will even run Android apps.