Translation guide
A type of non-volatile memory used in computers and electronic devices that can only be read, not easily written to. In Japanese, the English acronym ROM is overwhelmingly common, but full terms exist.
Referring to read-only memory in computing or electronics.
The standard term in Japanese, used in all contexts from casual to technical. Pronounced as the English letters.
このゲームはROMカートリッジに入っています。
This game is on a ROM cartridge.
ROMに保存されたデータは消えません。
Data stored in ROM is not erased.
The full Japanese translation. Used in formal technical documents or when explaining the concept. Less common in everyday speech.
読み出し専用メモリは、データの書き換えができません。
Read-only memory cannot be rewritten.
Occasionally used, but redundant since ROM already means memory. Might be heard in informal speech.
ROMメモリの容量はどれくらいですか？
What is the capacity of the ROM memory?
In Japanese, ROM is treated as a loanword and written in katakana as ロム. It is used in compound words like ROMカートリッジ (ROM cartridge) or ROMライター (ROM writer). The full term 読み出し専用メモリ is mainly seen in textbooks or specifications.