noun
Computing term for non-volatile memory that can be read but not normally written to.
このプログラムは読取り専用記憶装置に格納されています。
This program is stored in read-only memory.
Common abbreviation for read-only memory; 読取り専用記憶装置 is the full Japanese term.
Compound of 読取り (yomitori, 'reading') + 専用 (sen'yō, 'exclusive use') + 記憶装置 (kioku sōchi, 'storage device'), calque of English 'read-only memory'.