The standard software delivered with UNIX systems is not always sufficient.
Commercial software is often very specific and expensive.
On the other hand, there exist a lot of useful freely available UNIX packages such as editors, window managers, document formatting utilities, drawing tools, etc., which are distributed under source form. It frees end-users from having to get, configure, generate, install and manage the software. It also offers tools to system maintainers to generate and install those packages. ASIS has three logical entities. The repository is the central part of the project.