During the 80's the message ’Wire up the enterprise’ led to a boom in networking computers together. Through the 90's this message will become ’Service up the enterprise’. Businesses will require their computing infrastructure to deliver 'services’ in a reliable, uniform and transparent manner, enabling them to operate effectively.

However it is not feasible or practical to replace many existing (legacy) applications with applications adhering to modern architecture specifications at once. Nor is it possible to have the bulk of the software developers retrained to object based programming overnight. This can only be achieved over the course of time. This document presents the issues encountered when we look to protect the investment made in legacy applications, together with a practical, incremental migration strategy.

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