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2. Read-only memory - Wikipedia

   en.wikipedia.org/wiki/Read-only_memory

   Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware.

3. Non-volatile memory - Wikipedia

   en.wikipedia.org/wiki/Non-volatile_memory

   Other examples of non-volatile memory include read-only memory (ROM), EPROM (erasable programmable ROM) and EEPROM (electrically erasable programmable ROM), ferroelectric RAM, most types of computer data storage devices (e.g. disk storage, hard disk drives, optical discs, floppy disks, and magnetic tape), and early computer storage methods such ...

4. Non-volatile random-access memory - Wikipedia

   en.wikipedia.org/wiki/Non-volatile_random-access...

   Non-volatile random-access memory (NVRAM) is random-access memory that retains data without applied power. This is in contrast to dynamic random-access memory (DRAM) and static random-access memory (SRAM), which both maintain data only for as long as power is applied, or forms of sequential-access memory such as magnetic tape, which cannot be randomly accessed but which retains data ...

5. Programmable ROM - Wikipedia

   en.wikipedia.org/wiki/Programmable_ROM

   A programmable read-only memory (PROM) is a form of digital memory where the contents can be changed once after manufacture of the device. The data is then permanent and cannot be changed. It is one type of read-only memory (ROM).

6. Computer data storage - Wikipedia

   en.wikipedia.org/wiki/Computer_data_storage

   The deformities may be permanent (read only media), formed once (write once media) or reversible (recordable or read/write media). The following forms are in common use as of 2009: [30] CD, CD-ROM, DVD, BD-ROM: Read only storage, used for mass distribution of digital information (music, video, computer programs);

7. Computer memory - Wikipedia

   en.wikipedia.org/wiki/Computer_memory

   Examples of non-volatile memory include read-only memory, flash memory, most types of magnetic computer storage devices (e.g. hard disk drives, floppy disks and magnetic tape), optical discs, and early computer storage methods such as magnetic drum, paper tape and punched cards. [37]

8. Semiconductor memory - Wikipedia

   en.wikipedia.org/wiki/Semiconductor_memory

   Therefore, it is used for the memory in portable devices, which don't have disks, and for removable memory cards among other uses. Major types are: [7] [8] ROM (Read-only memory) – This is designed to hold permanent data, and in normal operation is only read from, not written to. Although many types can be written to, the writing process is ...

9. Read-only - Wikipedia

   en.wikipedia.org/wiki/Read-only

   In computer technology, read-only can refer to: Read-only memory (ROM), a type of storage media; Read-only access to memory using memory protection; Read-only access to files or directories in file system permissions; Read-only access for database administrators in database system permissions