platform-dependent character
Computing term for characters that may not display correctly across different operating systems or devices. Often contrasted with 機種依存文字.
See also: 機種依存文字
Using platform-dependent characters can cause garbled text on other devices.
機種依存文字 refers specifically to characters dependent on a particular machine or model, while 環境依存文字 is a broader term covering any platform or environment dependency.
Compound of 環境 (environment), 依存 (dependence), and 文字 (character). A modern technical term with no special historical derivation.