Today, eLearning is being conducted on a variety of devices with different screen sizes. (elearningindustry.com)
These are two phones of different screen sizes, screen - to - body ratios and aspect ratios, but otherwise nearly identical internal components. (androidcentral.com)
For eBooks obviously those factors are no longer an issue but authors do have to account for different screen sizes and custom settings of users. (edwardsbrothersmalloy.com)