also: きしゅいぞんもじ
noun
machine-dependent character; platform-dependent character
Computing term for characters that may not display correctly across different operating systems or devices, such as certain symbols or half-width katakana.
機種依存文字を使うと、他の環境で文字化けすることがあります。
Using machine-dependent characters can cause garbled text in other environments.
Please avoid entering platform-dependent characters in this form.