Data warehousing is the recording and storing of healthcare
information. A storage device can hold information, process
information or both. Devices that process data (data storage
equipment) can either access a separate portable recording
medium or a permanent component to store and retrieve
information. Electronic data storage requires electrical power
to store and retrieve data. Electromagnetic data may be stored
in either an analog or digital format on a variety of media.
This type of data is considered to be electronically encoded
data, and most electronically processed data storage media are
considered permanent storage, or data that will remain stored
when power is removed from the device.updated October 30, 2012