II. Articulating a Strategic Framework
Legacy systems
Usually, but not always, this term is used to describe applications developed using proprietary operating systems and that will only run on the hardware of the owners of the proprietary operating system. IBM's MVS and Digital Equipment Corporation's VMS are examples of proprietary software that restrict hardware platforms of applications. This term may also be used to describe existing, installed systems which typically, but not always, run on proprietary systems.
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