Storage

Storage is similar to memory in that both are used to retain information. Storage devices use magnetic or optical means to retain data whereas memory uses an electronic mechanism. Storage devices are non-volatile, which means they do not lose the information they contain when they are powered off. They have greater capacity but are much slower than memory devices.

Floppy disks, hard disks and tapes all store information magnetically. CDs and DVDs retain information optically. Storage is used to retain important information like programs (software) and data files.

A computer stores the results of processing operations for future use. This data can be put into either a temporary and/or a permanent storage area inside the computer. Before you begin any work, you should make sure that you know how to save your work.

In many cases the information that has been processed is stored in machine-readable format so that it may be accessed at a later time by a computer. This data is stored in binary form in bits. This practice requires the use of storage devices. You will learn in detail about the different storage devices and their functions on the next page. Be sure to look at the graphics provided for the examples.