Established in 1996, 21st Century Systems provides various software tools for the defense industry. The company offers 21CSI AEDGE for navigation and prototyping applications. It specializes in HiRSA command and control programs that provide antiterrorism operators with surveillance capabilities. 21st Century Systems HiRSA offers a 3-D view of the battlefield to operators. The company features SentinelNet software and Air Sentinel systems for the detection and location of targets. It provides Webster-ACE software for discoveries, visual-based assessments, and information modeling and management. 21st Century Systems also specializes in flight simulation, animation and graphic design services. The company employs more than 145 people in over eight states of the United States. It is headquartered in Omaha, Neb.