computer programs and program manuals operating in server client systems, intranet, and internet, for management of hardware resources like memory, storage, modem, etc, of client computer via data communication network; management of software resources by monitoring installed program lists, installing new programs on line and gathering and reporting the information about programs installed in client computer via a data communication network; monitoring the present conditions of running programs and system operating situations of a client computer and gathering and reporting the results via a data communication network; shutting off the executing of forbidden programs by client computer via a data communication network; remote installing of software in a client computer and management of the installed software thereof via a data communications network; messengering and community chatting and meeting via a data communication network; backing-up of the data in client computer into a server computer via a data communication network; management of network traffic, network equipment and peripherals via a data communication network; and security of the client computer against hacking programs or virus programs