HotCat is a server application used to send and receive information to/from a remote client (CoolCat) using the TCP/IP protocol. The client can this way completely control the remote computer in which the server is installed. The server application (HotCat) can serve many (thousands, theoretically) clients simultaneously. HotCat and CoolCat can be compared with other similar applications as NetBus or Back Orifice, but have a more complete set of functions and is a serious administration tool, with many security functions. HotCat and CoolCat run in Windows 95/98/ME/NT/2000/XP. They are programmed in Borland Delphi 5 using the Indy TCP/IP components (see about box).