Mobile Task Force Mu-4 specializes in the identification, tracking, retrieval, and containment of electronic devices and transmissions, especially anomalous computers and network-related anomalies. This includes the investigation of internet sites suspected of anomalous capabilities or involved in anomalous events. MTF Mu-4 is based primarily out of Site-15 and was involved in the initial containment of , SCP-###, and SCP-####.