| Subject | English | German |
| comp., MS | null character | Zeichen NULL (" A character code with a null value; literally, a character meaning "nothing." Although it is real in the sense of being recognizable, occupying space internally in the computer, and being sent or received as a character, a NUL character displays nothing, takes no space on the screen or on paper, and causes no specific action when sent to a printer. In ASCII, NUL is represented by the character code 0. ") |
| comp. | null character | Nullzeichen (nichtnumerische Null, Steuerzeichen) |
| comp. | null character | Blindzeichen |
| telegr. | null character | Füllzeichen |
| microel. | null character | Nullzeichen |
| IT, tech. | null character string | Nullkette |
| IT, tech. | null character string | Leerstring |