The UAPI Group introduced a set of acronyms, terms and concepts within the scope of image-based Linux. We will introduce topics such as UKI (Unified Kernel Image), DDI (Discoverable Disk Image), sysext (system extension), syscfg (system configuration), portables (portable services), and more. We will discuss where these concepts apply, what they can be used for, how they integrate and form the basis of our vision for image-based Linux, and where they are implemented and how today. Other talks in this devroom will make heavy use of these acronyms.