The Decision Desktop software, or d2 for short, was the first software to be developed in the Decision Deck project. It is a desktop, client/server application, meaning that it is designed to be installed locally (it is not a web application), and uses a database to store application data, thereby enabling a multiple user usage. One of its usage patterns is that several experts may enter evaluations in a decentralized manner, then these evaluations be analyzed by a coordinator, this analysis being then reviewed by one or several decision-maker. Historically the software has also been named EVAL, from the name of the originating project, and Decision Deck. It is now recommended to name it decision desktop to differentiate it from the other softwares produced in the Decision Deck project.