Airline reservation system came into existence in the late 1950s. At that time, these systems were just simple standalone systems used for managing flight related inventory, aircraft loading, maintaining schedules for flights and co-ordinating for sitting arrangements.
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Software documentation is written text that accompanies computer software. It either explains how it operates or how to use it, or may mean different things to people in different roles. Software documentation should describe how an application functions. It acts as a reference manual for users such as developers, technical architects and designers concerned with the application function. This is what most programmers mean when using the term software documentation.
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Software Product Engineering involves a host of activities, such as analyzing system requirements, estimating development requirements, preparing the architecture of the product, designing the software, implementing the code, incorporating the components, and finally testing the software to make sure that it satisfies client requirements.

There are several contributing factors besides skilled programming and project management that leads to successful product engineering. Some of these factors are: (more…)