Few examples of important systems supported by telecommunications are discussed in the succeeding paragraphs. Real Time Processing Systems: A real time proceeding system is a parallel time-relationship with an on-going activity, which produces information quickly enough tot, be useful in controlling the current or live and dynamic activity. Thus, the word real time describes a direct access or online processing system with severe time limitations. (A real time system uses direct access for processing, but a direct system need not be operating in time). It is also possible to have a direct access system that combines immediate access to records for inquire purpose with periodic transaction input and updating of records from a central collecting source. Such a system would meet many needs and would be simpler and less expensive than a real time system. Distribution Data Processing Networks: The relatively high cost of computer hardware in the sixties, spurred many organizations to establish a large central computer system and then to achieve economy by sharing the time of the system among many Web Design Company and other users. With crash of hardware prices, many organizations have set up their own systems using terminals linked to their own hardware. When one or two processors handle the workload of all outlying terminals, the word ‘time-sharing’ is probably still accurate. But when many geographical dispersed or distributed, a telecommunications network connects independent computer systems, and when messages processing tasks programs, data and other resources are transmitted between co-operating processors and terminals the term time –sharing may not be broad enough. Distributed Data Processing (DDP) Network is often used to describe this extension of time-sharing. DDP arrangement may be defined as one that places the needed data, along with computing and communication resources necessary to process these data, at the end-user’s location. This may result in many computers and significant software resources being shared among large number of users. NICNET and INDONET fall in the category of DDP networks.