Storing and Retrieving

Storing and retrieving is a two-step process. Storing dataallows an information systemto temporarily halt a data processing task so that other more urgent operations can be performed. This includes allowing the information system to be shut down. Retrieving data allows an information system to continue an interrupted processing task with the same data. The important point here is that the data that are retrieved must always be identical to the data that were originally stored. Otherwise the information system will be unreliable and useless. An important application of the storing and retrieving process is to create a backup copy of all stored data. If the original data store is damaged in any way, the backup store can be used to rebuild the damaged or missing data.

Storage
There are two types of storage:
 * Primary Storage - Primary Storage is the memory used at the moment to work on the current task. This kind of storage is temporary and is generally RAM.
 * Seconday Storage - Secondary Storage is storage that is more permanent, like ROM or a USB.