| Read Only Memories (ROMs) are a class of digital memories that can (generally) only be read from, they cannot be written to. However, many ROMs are also programmable, meaning that there are certain situations in which they can be written to.
See also Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Read/Write Memory (RWM), Compact Disc Read Only Memory (CD-ROM), Content Addressable Read Only Memory (CAROM). | 
