David, an expert patient at a health center, was observed generating numbers while seated in the reception area. He explained that he uses the numbers to organize patient files and schedule appointments to reduce conflicts among patients. Having lived with HIV for two decades, David faced stigma and discrimination due to the previous system where patient cards were placed on a table, causing unruly behavior as patients competed to be seen. He now uses a numbering system to better organize patient flow, reduce potential conflicts, and ensure confidentiality by not calling out patient names publicly.