Many DAT drives offer some type of hardware-based data compression, which can significantly increase capacities and decrease transfer rates, depending on the type of data being stored. A generic term commonly used to describe a structured collection of data. Databases can take many forms including unstructured full text, images, maps, statistics or a mixture of data sources. The theoretical model by which data are structured. Common data models include relational, network, hierarchical and object-oriented.
Data modelling is a methodology for structuring data for use in database system.
Densitometers A measuring device that registers the density of reflective or transparent materials. A 15 field standard for metadata or 'electronic information about electronic information'. With two layers on each of its two sides, it will hold up to 17 gigabytes of video, audio, or other information. The conversion of data into a form, called a cipher, that secures against unauthorised access to data. EPS E ncapsulated P ost S cript.