Flow Cytometry (FCM) is a rapid and highly sensitive technology used for qualitative and quantitative multi-parameter analysis, as well as cell sorting. It works by passing cells or particles in a single, continuous stream through a flow cytometer, where they are irradiated with lasers of specific wavelengths and analyzed in real time. This technology is widely applied in immunology, medicine, and biological research for applications such as cell phenotype identification, cell sorting, cytokine analysis, cell proliferation, apoptosis, cell cycle analysis, and cytotoxicity studies.