This MIB provides information about images running on the system. It has been extended to be useful for modular operating systems. The image table provides information about currently running image on the system. A modular operating system image consists of base image and all the installables loaded on the base image. A base image can be obtained from ceImageTable and all the installables installed on this image can be obtained using ceImageInstallableTable. Glossary: Base Image Essential part of the operating system, which forms base functionality on top of which patches can be added. MBI (Minimum bootable image) A small image which contains the smallest possible amount of functionality required to bootstrap and load a full image. This image typically contains the kernel, the file system drivers, and some hardware initialization code. It is executed at boot-up, and initializes just enough to access the rest of the code, and run it. Modular operating system An operating system that exhibits runtime modularity characteristics, such as multiple address spaces, fault isolation between processes, and modularity delivery and replacement of image components. Patch/Package/SMU (software maintenance upgrade) A modular replacement for some piece of on-box content, such as a binary shared object, or a text file. This entity is meant to replace or augment something that is already part of the base image. Composite package Group of packages delivered as a bundle. It is meant to be loaded on MBI. Script A non-binary piece of on-box content, typically a TCL script for use by the TCL interpreter, or some other form of interpreted router content. Installable An installable can be a patch, package, composite package, SMU or script. It is a piece of software which can be loaded on to the base image on a system. Location This term is used in this MIB to represent path where operating system image is located. It is the way of describing where on the file system the installed software is located. Modular operating system image consists of base image and installables loaded on this base image. Tag Tag is a virtual label placed by user that indicates a point deemed to be stable. It can be used to rollback to a system after an install that negatively impacted the functionality of the system. It gives points in system where user can go back to, to remove installables installed after that point of time.