ROM is a pre-recorded storage medium that can only be read from and not written to.
Source(s):
NIST SP 1800-21B
under Read-Only Memory
from
NIST SP 800-88 Rev. 1
NIST SP 800-88 Rev. 1
under Read-Only Memory
See Read-Only Memory.
Source(s):
NIST SP 800-88 Rev. 1