Plus and Minus is a controlled environment and modeling system for HIV/AIDS that invites people to reflect and think about a new future. By looking at 20 years of historical data and 20 more years of projected data, the model will provide the user with a new perspective and provide an insight into the full magnitude of the epidemic. The user is allowed to interact with the model, changing the possible outcome of the scenario. From day to day activities like not having a coffee and donating it, to out of our control like modifying the world\’s military spending, users can experience influencing the world\’s AIDS epidemic.