Documentation explains how the various systems or programs operate and accompany computer hardware, software and peripherals. It is the information needed to develop, use or maintain computer hardware and software and to permit access and retrieval of the data. Although documentation usually comes in the form of printed manuals, guide books, it may also come in electronic form, such as in ‘help screens’ contained within the computer software or documentation in data dictionaries and so on. Mostly, it is created when a specific computer application is used. This documentation can be critical to understanding the database system, particularly if it is being managed in an archival environment long after the creators of the system have left.
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