Zero Install is a decentralised installation system. Meta-data about each package is published in a "feed" file. Normally, a program is run by passing its name (a URI) to the 0launch command. This downloads the appropriate feeds, choose a set of implementations (a version of the program, along with any libraries it needs) and downloads them too. For details, see: http://0install.net However, it is sometimes useful to bundle a program and its libraries together on a CD (for example) so that it can be used on machines without a network connection, or where the network is very slow. It is also useful for archival purposes, in case the original web-sites supplying required libraries become unavailable. 0export takes the URI of a program and creates a "setup.sh" file; a self-extracting archive containing everything needed to run the program. This file can be executed on a machine without a network connection to install or run the program. Unlike the bundles created by the related zero2bundle program, programs installed using setup.sh are added to the Zero Install cache and are therefore still shared between users, and will get updates over the web where possible.