Editing Computer data storage (section)

=== Mutability ===
; Read/write storage or mutable storage : Allows information to be overwritten at any time. A computer without some amount of read/write storage for primary storage purposes would be useless for many tasks. Modern computers typically use read/write storage also for secondary storage.
; Slow write, fast read storage : Read/write storage which allows information to be overwritten multiple times, but with the write operation being much slower than the read operation. Examples include [[CD-RW]] and [[SSD]].
; Write once storage : [[Write once read many]] (WORM) allows the information to be written only once at some point after manufacture. Examples include semiconductor [[programmable read-only memory]] and [[CD-R]].
; Read only storage : Retains the information stored at the time of manufacture. Examples include [[Read-only memory#Factory programmed|mask ROM ICs]] and [[CD-ROM]].