*I: Which processor should be used? ?P: Processor A. AS: Fast *P: Processor B. AS: Already in use, thus cheaper. -P: Processor C. AO: Won't be available in time.The keyword I indicates an issue, P a position, AS a supporting argument, AO an opposing argument, - a rejected position, * an issue that has been resolved or a position that has been taken, and ? a positions about which no decision has been taken. A graphical version, called gIBIS, displays these relationships graphically. Another variation, rIBIS [], allows real-time argumentation, thereby, like other applications discussed below, combining session- and artifact- based collaboration.