A demarc extension is the process of connecting your organizationâs network to a data lineâsuch as a T1, DSL, or POTSâprovided by the telephone company or another vendor.
Legacy system. In computing, a legacy system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system.. Often a pejorative term, referencing a system as legacy means that it paved the way for the standards that would follow it.
Computer Based Information System (CBIS) is an information system in which the computer plays a major role. Such a system consists of the following elements: 1  Hardware: The term hardware refers to machinery. Data: Data are facts that are used by program to produce useful information. 2  Like programs, data are generally stored in machine-readable from on disk or tape until the computer needs them. 3  Procedures: Procedures are the policies that govern the operation of a computer system.