CU-SeeMe (also written as CUseeMe or CUSeeMe depending on the source) is an Internet videoconferencing client. CU-SeeMe can make point to point video calls without a server or make multi-point calls through server software first called a "reflector" and later called a "conference server" or Multipoint Control Unit (MCU). Later commercial versions of CU-SeeMe could also make point-to-point or multi-point calls to other vendor's standards-based H.323 endpoints and servers.