The "Applications" dimension includes all the solutions commonly used by companies' end users. They typically offer carefully developed interfaces that are far removed from the command lines typically available in tools in the “Infrastructure” dimension. The vast majority of these tools are developed by vendors, unlike infrastructure tools, which are primarily community based. These vendors have chosen the open source model for publication of their solutions. Their economic models are mostly based on support, and even warranties, for the products in question. These tools have played a key role in the widespread adoption of open source technologies, by offering quality applications with very broad scopes. There are almost no categories now that do not include at least one open source option. Even in very specific domains like library management and business intelligence, open source solutions are available.